{"id":3694,"date":"2023-03-14T07:23:58","date_gmt":"2023-03-14T07:23:58","guid":{"rendered":"https:\/\/www.coomcool.com\/?p=3694"},"modified":"2024-09-14T07:46:54","modified_gmt":"2024-09-14T07:46:54","slug":"causes-and-countermeasures-of-metal-corrosion","status":"publish","type":"post","link":"https:\/\/www.coomcool.com\/de\/causes-and-countermeasures-of-metal-corrosion\/","title":{"rendered":"Ursachen und Gegenma\u00dfnahmen der Metallkorrosion"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"3694\" class=\"elementor elementor-3694\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"wd-negative-gap elementor-element elementor-element-c751267 e-flex e-con-boxed e-con e-parent\" data-id=\"c751267\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2c841db elementor-widget elementor-widget-wd_text_block\" data-id=\"2c841db\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<div data-page-id=\"ICa2dQCtwofMqOxtwVIcXGGhnue\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><blockquote><div class=\"ace-line ace-line old-record-id-F18GdkdQPonq6kxDuTmcQKlpn9r\">Unter Metallkorrosion versteht man die Zersetzung von Werkstoffen durch die Reaktion zwischen Metall und seiner Umgebung. Es handelt sich um einen elektrochemischen Prozess, bei dem jede Bedingung, die den Elektronenfluss beg\u00fcnstigt, die Korrosion beschleunigt.<\/div><\/blockquote><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-e6464f7 e-flex e-con-boxed e-con e-parent\" data-id=\"e6464f7\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7006ead elementor-widget elementor-widget-wd_text_block\" data-id=\"7006ead\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<p><span style=\"color: #000000;\"><strong><span style=\"font-size: 24px;\">1. die Arten der Metallkorrosion<\/span><\/strong><\/span><\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-acf8bdf e-flex e-con-boxed e-con e-parent\" data-id=\"acf8bdf\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-79843fd elementor-widget elementor-widget-wd_text_block\" data-id=\"79843fd\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<div data-page-id=\"ICa2dQCtwofMqOxtwVIcXGGhnue\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-MehFdOwUooTCbix356ycSnC3nsz\">Abh\u00e4ngig von der Korrosionsumgebung und der Metallart kann Korrosion in drei Formen unterteilt werden: Verf\u00e4rbung, Korrosion und Rost.<\/div><div class=\"ace-line ace-line old-record-id-MehFdOwUooTCbix356ycSnC3nsz\">\u00a0<\/div><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-P2FPdjrMroNJzrxq76kcqTXsnOh\" data-list=\"bullet\"><div><strong>Verf\u00e4rbung<\/strong><\/div><\/li><\/ul><p>Verf\u00e4rbung ist eine milde Form der Oberfl\u00e4chenkorrosion, die zu Farbver\u00e4nderungen oder Glanzverlusten f\u00fchrt. Sie beeintr\u00e4chtigt im Allgemeinen nicht die strukturelle Integrit\u00e4t des Metalls, sondern nur sein Aussehen. Metalle wie Kupfer und Silber k\u00f6nnen sich in Umgebungen mit Sauerstoff, Schwefel oder Halogenen verf\u00e4rben und Oxide oder Sulfide bilden, insbesondere unter feuchten Bedingungen.<\/p><div>\u00a0<\/div><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-X2kfd3PnPo1eWAx6hBwc1TjynEc\" data-list=\"bullet\"><div><strong>Korrosion<\/strong><\/div><\/li><\/ul><div>Bei der Korrosion kommt es zu gr\u00f6\u00dferen Sch\u00e4den und Ver\u00e4nderungen der metallurgischen Eigenschaften. Wenn zum Beispiel Aluminium oder Zink korrodieren, bildet sich ein wei\u00dfes Pulver, und Kupfer bildet eine gr\u00fcne Schicht.<\/div><div>\u00a0<\/div><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-NYmcdY86uorEN8xRzjYcRH53nrd\" data-list=\"bullet\"><div><strong>Rost<\/strong><\/div><\/li><\/ul><div>Rost ist die Korrosion von Eisenmetallen wie Eisen, die zur Bildung von Eisenoxiden f\u00fchrt und die h\u00e4ufigste Art der Korrosion ist.<\/div><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-172192a e-flex e-con-boxed e-con e-parent\" data-id=\"172192a\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cf73d67 elementor-widget elementor-widget-wd_text_block\" data-id=\"cf73d67\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<h2 class=\"heading-2\"><strong>2. der Mechanismus der allgemeinen Metallkorrosion<\/strong><\/h2>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-bceaf79 e-flex e-con-boxed e-con e-parent\" data-id=\"bceaf79\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-64ddf25 elementor-widget elementor-widget-wd_text_block\" data-id=\"64ddf25\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<div class=\"ace-line ace-line old-record-id-JmBid5ouGo0Ak0xscZVcW2kxnNc\"><div data-page-id=\"ICa2dQCtwofMqOxtwVIcXGGhnue\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-Pb4mdtoX5ostEWxHa1WcUpcsn0c\">Das Wesen der Korrosion ist der Austausch von Elektronen zwischen der Metalloberfl\u00e4che und ihrer Umgebung. Bei diesem Prozess wird das Metall oxidiert, was zu elektrochemischen Reaktionen f\u00fchrt. Bei der Korrosion von Eisen mit Wassertr\u00f6pfchen beispielsweise bildet sich eine Konzentrationszelle, die Korrosion verursacht. Der Sauerstoffgehalt in der Mitte des Wassertropfens ist geringer als an den R\u00e4ndern, so dass ein Anoden- und ein Kathodenbereich entstehen, was zur Bildung von Rost f\u00fchrt.<\/div><\/div><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-290ca82 e-flex e-con-boxed e-con e-parent\" data-id=\"290ca82\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6455a58 elementor-widget elementor-widget-wd_text_block\" data-id=\"6455a58\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<div data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\">Mechanismus der Rostbildung auf Eisenoberfl\u00e4chen<span style=\"font-size: 15px; text-align: var(--text-align); background-color: var(--wd-main-bgcolor); color: var(--wd-text-color);\"><\/span><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-c7f381e e-flex e-con-boxed e-con e-parent\" data-id=\"c7f381e\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-58e4d1d elementor-widget__width-initial elementor-widget elementor-widget-wd_image_or_svg\" data-id=\"58e4d1d\" data-element_type=\"widget\" data-widget_type=\"wd_image_or_svg.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n\t\t<div class=\"wd-image text-center\">\n\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"492\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Iron-surface-rusting-mechanism-768x492.png\" class=\"attachment-medium_large size-medium_large\" alt=\"\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Iron-surface-rusting-mechanism-768x492.png 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Iron-surface-rusting-mechanism-300x192.png 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Iron-surface-rusting-mechanism-18x12.png 18w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Iron-surface-rusting-mechanism-150x96.png 150w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Iron-surface-rusting-mechanism.png 1014w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t<\/div>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-02fee0a e-flex e-con-boxed e-con e-parent\" data-id=\"02fee0a\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5e4128e elementor-widget elementor-widget-wd_text_block\" data-id=\"5e4128e\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<div class=\"ace-line ace-line old-record-id-JmBid5ouGo0Ak0xscZVcW2kxnNc\"><div data-page-id=\"ICa2dQCtwofMqOxtwVIcXGGhnue\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-Pb4mdtoX5ostEWxHa1WcUpcsn0c\"><div data-page-id=\"ICa2dQCtwofMqOxtwVIcXGGhnue\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ol class=\"list-number1\" start=\"1\"><li class=\"ace-line ace-line old-record-id-PjIld9VmkotQENxsIYMcACdinic\" data-list=\"number\"><div>Der sauerstoffarme Bereich fungiert als Anode, in der Eisenatome Elektronen verlieren und zu Eisenionen werden: Fe \u2192 Fe\u00b2\u207a + 2e-<\/div><\/li><li class=\"ace-line ace-line old-record-id-CASOdqaXpomFohxXlCQcUL39nvh\" data-list=\"number\"><div>Am Rande des Wassertropfens reduzieren das Wasser und die freigesetzten Elektronen den Sauerstoff und bilden Hydroxidionen (Kathodenbereich): \u00bd O\u2082 + H\u2082O + 2e- \u2192 2OH-<\/div><\/li><li class=\"ace-line ace-line old-record-id-Wquqd0CFBo0ohKxZNeocmdU3nSh\" data-list=\"number\"><div>Die Hydroxid-Ionen verbinden sich mit den Eisen-Ionen zu Eisenhydroxid: Fe\u00b2\u207a + 2OH- \u2192 Fe(OH)\u2082<\/div><\/li><li class=\"ace-line ace-line old-record-id-BIvBd6SnAobtoDxxd9Ac5AfRnZc\" data-list=\"number\"><div>Eisenhydroxid reagiert weiter mit Wasser und Sauerstoff und bildet braunen Rost: 2Fe(OH)\u2082 + H\u2082O + \u00bd O\u2082 \u2192 2Fe(OH)\u2083<\/div><\/li><\/ol><\/div><\/div><\/div><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-30656e7 e-flex e-con-boxed e-con e-parent\" data-id=\"30656e7\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-79c78d1 elementor-widget elementor-widget-wd_text_block\" data-id=\"79c78d1\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<h2 class=\"heading-2\"><strong>3) Arten von Korrosion<\/strong><\/h2>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-3b70191 e-flex e-con-boxed e-con e-parent\" data-id=\"3b70191\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f36eb98 elementor-widget elementor-widget-wd_text_block\" data-id=\"f36eb98\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<div data-page-id=\"ICa2dQCtwofMqOxtwVIcXGGhnue\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-OipNdhDKSo4hFexh295cuWrFn3g\"><strong>3.1 Gleichm\u00e4\u00dfige Korrosion<\/strong><\/div><div class=\"ace-line ace-line old-record-id-OipNdhDKSo4hFexh295cuWrFn3g\">Wenn Wasser oder andere Fl\u00fcssigkeiten eine Metalloberfl\u00e4che vollst\u00e4ndig bedecken, verschieben sich die Anoden- und Kathodenbereiche kontinuierlich, was zu einer gleichm\u00e4\u00dfigen Korrosion f\u00fchrt. Dies ist die h\u00e4ufigste Form der allt\u00e4glichen Metallkorrosion.<\/div><div class=\"ace-line ace-line old-record-id-M047dPoTpoRyDgxo0eic5T7YnFb\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-JTtMdbNy7oPbAtxJRH7c5fOrn5w\"><strong>3.2 Elektrolyteffekte<\/strong><\/div><div class=\"ace-line ace-line old-record-id-JTtMdbNy7oPbAtxJRH7c5fOrn5w\">Reines Wasser hat aufgrund seiner geringen Ionisierungskapazit\u00e4t ein geringes Korrosionspotenzial. Durch die Zugabe von S\u00e4uren, Basen oder Salzen erh\u00f6ht sich jedoch die Ionenkonzentration, was die Korrosion beschleunigt. In einigen F\u00e4llen reagieren die Elektrolyte mit der Metalloberfl\u00e4che und bilden einen Passivierungsfilm, der den Korrosionsprozess verlangsamt.<\/div><div class=\"ace-line ace-line old-record-id-U9rwdZ4BeoWvmWxTldCcDREwn2e\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-OwRsdLRALo8KJrx8Qy4c5Ls9nAd\"><strong>3.3 Korrosion durch Sauerstoffkonzentration<\/strong><\/div><div class=\"ace-line ace-line old-record-id-OwRsdLRALo8KJrx8Qy4c5Ls9nAd\">Wie bereits beschrieben, fungiert der Bereich mit niedrigem Sauerstoffgehalt als Anode und der Bereich mit hohem Sauerstoffgehalt als Kathode, was zur Korrosion der Sauerstoffkonzentrationszelle f\u00fchrt.<\/div><div class=\"ace-line ace-line old-record-id-B8aSdqYuko0oMbxGMcjcFvK5nWg\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-SKRXdVqpGozdtux96O4c8ycEnRc\"><strong>3.4 Galvanische Korrosion<\/strong><\/div><div class=\"ace-line ace-line old-record-id-SKRXdVqpGozdtux96O4c8ycEnRc\">Wenn verschiedene Metalle in dieselbe Fl\u00fcssigkeit getaucht werden, kommt es zu einer elektrochemischen Reaktion, die galvanische Korrosion verursacht. Dies ist das Prinzip von Batterien.<\/div><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-0cad9c8 e-flex e-con-boxed e-con e-parent\" data-id=\"0cad9c8\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-10505c0 elementor-widget elementor-widget-wd_text_block\" data-id=\"10505c0\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<div data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\"><div data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\">Das Prinzip der Batterie<\/div><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-6eef768 e-flex e-con-boxed e-con e-parent\" data-id=\"6eef768\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0d7ccc4 elementor-widget__width-initial elementor-widget elementor-widget-wd_image_or_svg\" data-id=\"0d7ccc4\" data-element_type=\"widget\" data-widget_type=\"wd_image_or_svg.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n\t\t<div class=\"wd-image text-center\">\n\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"588\" height=\"441\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Battery-principle.jpg\" class=\"attachment-medium_large size-medium_large\" alt=\"\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Battery-principle.jpg 588w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Battery-principle-300x225.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Battery-principle-16x12.jpg 16w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Battery-principle-150x113.jpg 150w\" sizes=\"(max-width: 588px) 100vw, 588px\" \/>\t\t\t\t\t<\/div>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-61c88ee e-flex e-con-boxed e-con e-parent\" data-id=\"61c88ee\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0258fd4 elementor-widget elementor-widget-wd_text_block\" data-id=\"0258fd4\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<div data-page-id=\"ICa2dQCtwofMqOxtwVIcXGGhnue\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-OipNdhDKSo4hFexh295cuWrFn3g\"><div data-page-id=\"ICa2dQCtwofMqOxtwVIcXGGhnue\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-VTR1dLNL8oPye1xu4IVcKARPn9d\"><strong>3.5 Erosion Korrosion<\/strong><\/div><div class=\"ace-line ace-line old-record-id-VTR1dLNL8oPye1xu4IVcKARPn9d\">Erosionskorrosion tritt auf, wenn schnell flie\u00dfende Fl\u00fcssigkeiten die Metalloberfl\u00e4che mechanisch abtragen. Dies ist besonders wichtig bei Rohrleitungen und Pumpensystemen.<\/div><div class=\"ace-line ace-line old-record-id-T6C4dWNXyouq0wxWZ6HcSYZNngc\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-XZNGdCKDGoJBuhxj3odcIsMjnab\"><strong>3.6 Fretting-Korrosion<\/strong><\/div><div class=\"ace-line ace-line old-record-id-XZNGdCKDGoJBuhxj3odcIsMjnab\">\u00c4hnlich wie Erosion tritt Passungsrost auf, wenn feste Materialien Schutzschichten von Metalloberfl\u00e4chen abtragen, was h\u00e4ufig an Kontaktstellen zwischen Teilen der Fall ist.<\/div><div class=\"ace-line ace-line old-record-id-X0XkdLfG3ogEOwxfKfScgxj3nOc\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-YA8SdgzWXoo1lyxacaWcjyUmnhb\"><strong>3.7 Lochfra\u00dfkorrosion<\/strong><\/div><div class=\"ace-line ace-line old-record-id-YA8SdgzWXoo1lyxacaWcjyUmnhb\">Lochfra\u00dfkorrosion tritt auf, wenn kleine Bereiche einer Metalloberfl\u00e4che \u00f6rtlich begrenzt korrodieren. Wenn zum Beispiel eine sch\u00fctzende Oxidschicht zerkratzt wird, wird der freiliegende Bereich zur Anode, was zu einer Korrosionsgrube f\u00fchrt.<\/div><div class=\"ace-line ace-line old-record-id-XZ53dBNvFoNs7Ix7dIGcCrAEnGe\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-Tkg9dx5ROoF2mixYgJkcMq1CnAh\"><strong>3.8 Interkristalline Korrosion<\/strong><\/div><div class=\"ace-line ace-line old-record-id-Tkg9dx5ROoF2mixYgJkcMq1CnAh\">Interkristalline Korrosion ist eine Art von \u00f6rtlich begrenzter Korrosion, die sich entlang der Korngrenzen von Metallen ausbreitet. Sie tritt bei rostfreiem Stahl auf, wenn er auf bestimmte Temperaturen erhitzt wird. Dabei entstehen an den Korngrenzen chromarme Zonen, die zu einem Verlust der Korrosionsbest\u00e4ndigkeit f\u00fchren.<\/div><div class=\"ace-line ace-line old-record-id-ThPwdNiVNowdnPx6p7pctdEHnOc\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-AWjGd9Kg8o1ICaxmzzOc1bnHnrb\"><strong>3.9 Spannungsrisskorrosion<\/strong><\/div><div class=\"ace-line ace-line old-record-id-AWjGd9Kg8o1ICaxmzzOc1bnHnrb\">Spannungskorrosion tritt unter Zugspannung auf, insbesondere bei geschwei\u00dften Werkst\u00fccken mit Eigenspannung. Der Schutzfilm auf der Metalloberfl\u00e4che wird besch\u00e4digt, was zu Rissen f\u00fchrt, die sich mit der Zeit ausbreiten und zu Br\u00fcchen f\u00fchren.<\/div><div class=\"ace-line ace-line old-record-id-In9fdieK2oF9KjxWIv3cPS61ndc\">\u00a0<\/div><div class=\"ace-line ace-line old-record-id-XSvYdpLevoY5WCxtWmpcLhrinNe\"><strong>3.10 Mikrobiell induzierte Korrosion<\/strong><\/div><div class=\"ace-line ace-line old-record-id-XSvYdpLevoY5WCxtWmpcLhrinNe\">Mikroorganismen, wie aerobe und anaerobe Bakterien, in Metallbearbeitungsfl\u00fcssigkeiten auf Wasserbasis k\u00f6nnen mikrobiell bedingte Korrosion verursachen. Aerobe Bakterien bauen langkettige Molek\u00fcle in Schmierstoffen ab und bilden S\u00e4uren, die Korrosion verursachen, w\u00e4hrend anaerobe Bakterien Schwefelverbindungen produzieren, die zu Verf\u00e4rbungen f\u00fchren.<\/div><\/div><\/div><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-9d608a8 e-flex e-con-boxed e-con e-parent\" data-id=\"9d608a8\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-13cc183 elementor-widget elementor-widget-wd_text_block\" data-id=\"13cc183\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<div data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\"><div data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\"><div data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\">Bakterielle Atmung<\/div><\/div><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-edb740b e-flex e-con-boxed e-con e-parent\" data-id=\"edb740b\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a594e90 elementor-widget__width-initial elementor-widget elementor-widget-wd_image_or_svg\" data-id=\"a594e90\" data-element_type=\"widget\" data-widget_type=\"wd_image_or_svg.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n\t\t<div class=\"wd-image text-center\">\n\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"768\" height=\"292\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Bacterial-respiration-768x292.png\" class=\"attachment-medium_large size-medium_large\" alt=\"\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Bacterial-respiration-768x292.png 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Bacterial-respiration-300x114.png 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Bacterial-respiration-1024x389.png 1024w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Bacterial-respiration-18x7.png 18w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Bacterial-respiration-1200x456.png 1200w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Bacterial-respiration-150x57.png 150w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/Bacterial-respiration.png 1222w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t<\/div>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-8e22f34 e-flex e-con-boxed e-con e-parent\" data-id=\"8e22f34\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2c3f90e elementor-widget elementor-widget-wd_text_block\" data-id=\"2c3f90e\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<h2 class=\"heading-2\">4. korrosionsverhindernde Gegenma\u00dfnahmen<\/h2>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-92f9d07 e-flex e-con-boxed e-con e-parent\" data-id=\"92f9d07\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-97e1915 elementor-widget elementor-widget-wd_text_block\" data-id=\"97e1915\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<div data-page-id=\"ICa2dQCtwofMqOxtwVIcXGGhnue\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul><li class=\"ace-line ace-line old-record-id-BljXdL4iSoOUCJxsvZNc9TUlncb\"><strong>Passivierungsmittel<\/strong><\/li><\/ul><div class=\"ace-line ace-line old-record-id-BljXdL4iSoOUCJxsvZNc9TUlncb\">Metalle k\u00f6nnen zur Passivierung eine nat\u00fcrliche Oxidschicht bilden, oder es k\u00f6nnen bestimmte Salze verwendet werden, um einen Schutzfilm auf der Metalloberfl\u00e4che zu erzeugen. Eisen kann zum Beispiel durch Eintauchen in Nitrite, Chromate oder Molybdate passiviert werden.<\/div><div class=\"ace-line ace-line old-record-id-V7zVdmlHxoq9GMxO6pMcqMSZnKe\">\u00a0<\/div><ul><li class=\"ace-line ace-line old-record-id-QsJIdakA7oxs8ExCEvkc1mYbnee\"><strong>Organische Filme<\/strong><\/li><\/ul><div class=\"ace-line ace-line old-record-id-QsJIdakA7oxs8ExCEvkc1mYbnee\">Organische Filme, wie z. B. Beschichtungen auf \u00d6lbasis, k\u00f6nnen auf Metalloberfl\u00e4chen aufgebracht werden und bilden eine Barriere zwischen dem Metall und seiner Umgebung. Diese Methode bietet jedoch nur einen vor\u00fcbergehenden Schutz.<\/div><div class=\"ace-line ace-line old-record-id-BIbodxPato5as3xSyiVcRUl0nPd\">\u00a0<\/div><ul><li class=\"ace-line ace-line old-record-id-UWzQdpm9QoYdlWxLdjpcBUDNnJh\"><strong>Bakterielle Inhibitoren<\/strong><\/li><\/ul><div class=\"ace-line ace-line old-record-id-UWzQdpm9QoYdlWxLdjpcBUDNnJh\">Wenn die Korrosion durch Bakterien verursacht wird, k\u00f6nnen Bakterizide eingesetzt werden, um aerobe Bakterien zu hemmen, w\u00e4hrend Sauerstoff hinzugef\u00fcgt werden kann, um anaerobe Bakterien zu bek\u00e4mpfen. Ist die mikrobielle Korrosion bereits weit fortgeschritten, muss die Arbeitsfl\u00fcssigkeit m\u00f6glicherweise ausgetauscht werden, um weitere Sch\u00e4den zu verhindern.<\/div><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-27f41e0 e-flex e-con-boxed e-con e-parent\" data-id=\"27f41e0\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f6f57c2 elementor-widget__width-inherit elementor-widget elementor-widget-spacer\" data-id=\"f6f57c2\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 25-07-2024 *\/\n.elementor-column .elementor-spacer-inner{height:var(--spacer-size)}.e-con{--container-widget-width:100%}.e-con-inner>.elementor-widget-spacer,.e-con>.elementor-widget-spacer{width:var(--container-widget-width,var(--spacer-size));--align-self:var(--container-widget-align-self,initial);--flex-shrink:0}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container,.e-con>.elementor-widget-spacer>.elementor-widget-container{height:100%;width:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer{height:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner{height:var(--container-widget-height,var(--spacer-size))}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty,.e-con>.elementor-widget-spacer.elementor-widget-empty{position:relative;min-height:22px;min-width:22px}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty 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