{"id":2732,"date":"2026-03-04T09:16:06","date_gmt":"2026-03-04T08:16:06","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2732"},"modified":"2026-03-04T09:16:13","modified_gmt":"2026-03-04T08:16:13","slug":"monel-corrosion-resistance","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/de\/monel-corrosion-resistance\/","title":{"rendered":"Warum ist die Korrosionsbest\u00e4ndigkeit von Monel in HF-S\u00e4ure so gut?"},"content":{"rendered":"<p data-path-to-node=\"3\">In der anspruchsvollen Landschaft der chemischen Verarbeitung und der Schiffstechnik ist ein Materialversagen selten eine Option. Austenitische nichtrostende St\u00e4hle sind zwar f\u00fcr ein breites Spektrum von Anwendungen geeignet, sto\u00dfen aber h\u00e4ufig in nicht oxidierenden S\u00e4uren und in Meerwasser mit hoher Str\u00f6mungsgeschwindigkeit an ihre Grenzen. Dies ist der Punkt, an dem <b data-path-to-node=\"3\" data-index-in-node=\"281\">Korrosionsbest\u00e4ndigkeit von Monel<\/b> wird zum entscheidenden Faktor f\u00fcr die technische Spezifikation. Als Nickel-Kupfer-Mischkristalllegierung bietet Monel (insbesondere Alloy 400 und K-500) ein einzigartiges elektrochemisches Profil, das in Umgebungen, in denen Legierungen auf Chrombasis unter einer schnellen Depassivierung leiden, edel bleibt.<\/p>\n<p data-path-to-node=\"3\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-2733\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149.jpg\" alt=\"Warum ist Monel in HF-S\u00e4ure besonders korrosionsbest\u00e4ndig?\" width=\"1024\" height=\"765\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149-300x224.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149-768x574.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149-16x12.jpg 16w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h3 data-path-to-node=\"4\">Die elektrochemische Synergie von Nickel und Kupfer<\/h3>\n<p data-path-to-node=\"5\">Der Hauptgrund f\u00fcr die \u00fcberlegene <b data-path-to-node=\"5\" data-index-in-node=\"43\">Korrosionsbest\u00e4ndigkeit von Monel<\/b> lies in its binary composition. By alloying approximately 63% nickel with 28-34% copper, the material benefits from the noble characteristics of both elements. Unlike stainless steels, which rely on a fragile chromium-oxide &#8220;passive&#8221; layer that can be stripped away by chlorides or reducing agents, Monel is inherently resistant to many non-oxidizing conditions.<\/p>\n<p data-path-to-node=\"6\">In Flusss\u00e4ure (HF)-Alkylierungsanlagen - eine der aggressivsten Umgebungen in der Raffinerie - ist Stahl 400 der Industriestandard. Er weist bei allen Konzentrationen bis zum Siedepunkt eine niedrige Korrosionsrate auf, vorausgesetzt, die S\u00e4ure ist nicht stark bel\u00fcftet.<\/p>\n<hr data-path-to-node=\"7\" \/>\n<h3 data-path-to-node=\"8\">Vergleichende Leistung: Monel 400 vs. g\u00e4ngige Legierungen<\/h3>\n<p data-path-to-node=\"9\">Die folgende Tabelle zeigt die Leistungskennzahlen von Monel im Vergleich zu anderen industriellen Legierungen in bestimmten korrosiven Medien.<\/p>\n<table data-path-to-node=\"10\">\n<thead>\n<tr>\n<td><strong>Umwelt<\/strong><\/td>\n<td><strong><a href=\"https:\/\/www.nickelcasting.com\/ko\/%eb%8b%88%ec%bc%88-%ed%95%a9%ea%b8%88\/%eb%aa%a8%eb%84%ac-%ea%b8%88%ec%86%8d-%ed%95%a9%ea%b8%88\/%eb%aa%a8%eb%84%ac-400\/\">Monel 400<\/a><\/strong><\/td>\n<td><strong>316L Edelstahl<\/strong><\/td>\n<td><strong>C276 Hastelloy<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"10,1,0,0\"><b data-path-to-node=\"10,1,0,0\" data-index-in-node=\"0\">Sieden 70% HF-S\u00e4ure<\/b><\/span><\/td>\n<td><span data-path-to-node=\"10,1,1,0\">Ausgezeichnet<\/span><\/td>\n<td><span data-path-to-node=\"10,1,2,0\">Schnelles Scheitern<\/span><\/td>\n<td><span data-path-to-node=\"10,1,3,0\">Gut<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"10,2,0,0\"><b data-path-to-node=\"10,2,0,0\" data-index-in-node=\"0\">Stehendes Meerwasser<\/b><\/span><\/td>\n<td><span data-path-to-node=\"10,2,1,0\">Unterliegt Pitting<\/span><\/td>\n<td><span data-path-to-node=\"10,2,2,0\">M\u00e4\u00dfige Lochfra\u00dfbildung<\/span><\/td>\n<td><span data-path-to-node=\"10,2,3,0\">\u00dcberlegene<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"10,3,0,0\"><b data-path-to-node=\"10,3,0,0\" data-index-in-node=\"0\">Flie\u00dfendes Seewasser (&gt;3m\/s)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"10,3,1,0\">Au\u00dfergew\u00f6hnlich<\/span><\/td>\n<td><span data-path-to-node=\"10,3,2,0\">Erosion\/Korrosion<\/span><\/td>\n<td><span data-path-to-node=\"10,3,3,0\">Au\u00dfergew\u00f6hnlich<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"10,4,0,0\"><b data-path-to-node=\"10,4,0,0\" data-index-in-node=\"0\">Reduktion von Schwefels\u00e4ure<\/b><\/span><\/td>\n<td><span data-path-to-node=\"10,4,1,0\">Gut (bis zu 80%)<\/span><\/td>\n<td><span data-path-to-node=\"10,4,2,0\">Schlecht<\/span><\/td>\n<td><span data-path-to-node=\"10,4,3,0\">Ausgezeichnet<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr data-path-to-node=\"11\" \/>\n<h3 data-path-to-node=\"12\">Minderung von Spannungsrisskorrosion (SCC)<\/h3>\n<p data-path-to-node=\"13\">Einer der wichtigsten Vorteile der Monel-Reihe ist ihre weitgehende Immunit\u00e4t gegen chloridioneninduzierte Spannungsrisskorrosion (SCC). In Hochdruck-Schiffskomponenten versagen die nichtrostenden St\u00e4hle der Serie 300 oft katastrophal aufgrund von Mikrorissen, die sich in Gegenwart von Chloriden ausbreiten.<\/p>\n<p data-path-to-node=\"14\"><b data-path-to-node=\"14\" data-index-in-node=\"0\">Monel K-500<\/b>, das Aluminium und Titan zur Ausscheidungsh\u00e4rtung hinzuf\u00fcgt, erh\u00e4lt die hohe <b data-path-to-node=\"14\" data-index-in-node=\"94\">Korrosionsbest\u00e4ndigkeit von Monel<\/b> der G\u00fcteklasse 400 und bietet gleichzeitig eine Streckgrenze (<span class=\"math-inline\" data-math=\"\\sigma_y\" data-index-in-node=\"172\">$\\sigma_y$<\/span>) comparable to many alloy steels. However, engineers must be cautious of hydrogen embrittlement in K-500 when used in &#8220;sour&#8221; (<span class=\"math-inline\" data-math=\"H_2S\" data-index-in-node=\"307\">$H_2S$<\/span>) Umgebungen mit hohen Spannungen.<\/p>\n<p data-path-to-node=\"14\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-2734\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/150.jpg\" alt=\"Warum ist Monel in HF-S\u00e4ure besonders korrosionsbest\u00e4ndig?\" width=\"1024\" height=\"765\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/150.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/150-300x224.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/150-768x574.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/150-16x12.jpg 16w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h3 data-path-to-node=\"15\">Kavitations- und Erosionsbest\u00e4ndigkeit von Schiffshardware<\/h3>\n<p data-path-to-node=\"16\">In the maritime sector, corrosion is often compounded by mechanical wear. Pump impellers and propeller shafts face high-velocity flow that causes &#8220;cavitation erosion.&#8221; The copper content in Monel provides a natural bio-fouling resistance, preventing the attachment of marine organisms that lead to localized crevice corrosion. Furthermore, its high ductility ensures that the material absorbs energy from collapsing cavitation bubbles without the surface pitting typical of more brittle metals.<\/p>\n<hr data-path-to-node=\"17\" \/>\n<h3 data-path-to-node=\"18\">Verwandte Fragen und Antworten:<\/h3>\n<p data-path-to-node=\"19\"><b data-path-to-node=\"19\" data-index-in-node=\"0\">F1: Wie wirkt sich die Bel\u00fcftung auf die Korrosionsrate von Monel 400 in sauren Umgebungen aus?<\/b><\/p>\n<p data-path-to-node=\"19\">A1: Monel is a &#8220;reducing-environment&#8221; alloy. In acids like Hydrofluoric or Sulfuric, the presence of dissolved oxygen (aeration) significantly increases the corrosion rate. Oxygen acts as a depolarizer, facilitating the cathodic reaction and stripping the protective film. For high-aeration scenarios, a more highly alloyed material like Hastelloy C276 may be required.<\/p>\n<p data-path-to-node=\"20\"><b data-path-to-node=\"20\" data-index-in-node=\"0\">F2: Kann Monel K-500 in Sauergas verwendet werden (<span class=\"math-inline\" data-math=\"H_2S\" data-index-in-node=\"41\">$H_2S$<\/span>) nach den NACE-Normen?<\/b><\/p>\n<p data-path-to-node=\"20\">A2: Ja, aber mit Einschr\u00e4nkungen. Obwohl K-500 eine ausgezeichnete allgemeine Best\u00e4ndigkeit aufweist, kann es anf\u00e4llig f\u00fcr wasserstoffinduzierte Spannungsrisse (HISC) sein, wenn die H\u00e4rte bestimmte Werte \u00fcberschreitet (typischerweise 35 HRC) oder wenn es mit verzinktem\/kathodisch gesch\u00fctztem Stahl verbunden wird, der naszierenden Wasserstoff erzeugt.<\/p>\n<p data-path-to-node=\"21\"><b data-path-to-node=\"21\" data-index-in-node=\"0\">F3: Warum wird Monel bei bestimmten Meerwasser-Rohrleitungssystemen gegen\u00fcber Titan bevorzugt?<\/b><\/p>\n<p data-path-to-node=\"21\">A3: W\u00e4hrend Titan eine nahezu perfekte Korrosionsbest\u00e4ndigkeit bietet, wird Monel aufgrund seiner hervorragenden W\u00e4rmeleitf\u00e4higkeit und seiner nat\u00fcrlichen Antifouling-Eigenschaften h\u00e4ufig f\u00fcr W\u00e4rmetauscher und Rohrleitungen bevorzugt. An der Oberfl\u00e4che freigesetzte Kupferionen hemmen das Wachstum von Seepocken und Algen und sorgen f\u00fcr eine hohe Durchflussleistung ohne chemische Biozide.<\/p>","protected":false},"excerpt":{"rendered":"<p>In the demanding landscape of chemical processing and marine engineering, material failure is rarely an option. While austenitic stainless steels serve a broad range of applications, they frequently meet their limit in non-oxidizing acids and high-velocity seawater. This is where Monel corrosion resistance becomes the decisive factor for technical specification. As a nickel-copper solid-solution alloy, [&hellip;]<\/p>","protected":false},"author":1,"featured_media":2733,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2732","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"spectra_custom_meta":{"_edit_lock":["1772612031:1"],"_edit_last":["1"],"rank_math_seo_score":["71"],"rank_math_description":["Critical marine and chemical systems fail when standard alloys succumb to HF acid or brine. Discover how Monel's unique chemistry halts SCC where others crack."],"rank_math_focus_keyword":["monel corrosion resistance"],"_thumbnail_id":["2733"],"_wp_page_template":["default"],"ilj_blacklistdefinition":["a:0:{}"],"ilj_linkdefinition":["a:1:{i:0;s:26:\"monel corrosion resistance\";}"],"rank_math_internal_links_processed":["1"],"site-sidebar-layout":["default"],"ast-site-content-layout":["default"],"site-content-style":["default"],"site-sidebar-style":["default"],"theme-transparent-header-meta":["default"],"astra-migrate-meta-layouts":["set"],"_uag_page_assets":["a:9:{s:3:\"css\";s:263:\".uag-blocks-common-selector{z-index:var(--z-index-desktop) !important}@media (max-width: 976px){.uag-blocks-common-selector{z-index:var(--z-index-tablet) !important}}@media (max-width: 767px){.uag-blocks-common-selector{z-index:var(--z-index-mobile) !important}}\n\";s:2:\"js\";s:0:\"\";s:18:\"current_block_list\";a:8:{i:0;s:11:\"core\/search\";i:1;s:10:\"core\/group\";i:2;s:12:\"core\/heading\";i:3;s:17:\"core\/latest-posts\";i:4;s:20:\"core\/latest-comments\";i:5;s:13:\"core\/archives\";i:6;s:15:\"core\/categories\";i:7;s:10:\"core\/image\";}s:8:\"uag_flag\";b:0;s:11:\"uag_version\";s:10:\"1776935854\";s:6:\"gfonts\";a:0:{}s:10:\"gfonts_url\";s:0:\"\";s:12:\"gfonts_files\";a:0:{}s:14:\"uag_faq_layout\";b:0;}"],"_elementor_page_assets":["a:0:{}"],"_uag_css_file_name":["uag-css-2732.css"]},"uagb_featured_image_src":{"full":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149.jpg",1024,765,false],"thumbnail":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149-150x150.jpg",150,150,true],"medium":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149-300x224.jpg",300,224,true],"medium_large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149-768x574.jpg",768,574,true],"large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149.jpg",1024,765,false],"1536x1536":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149.jpg",1024,765,false],"2048x2048":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149.jpg",1024,765,false],"trp-custom-language-flag":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/03\/149-16x12.jpg",16,12,true]},"uagb_author_info":{"display_name":"nickel","author_link":"https:\/\/www.nickelcasting.com\/de\/author\/nickel\/"},"uagb_comment_info":0,"uagb_excerpt":"In the demanding landscape of chemical processing and marine engineering, material failure is rarely an option. While austenitic stainless steels serve a broad range of applications, they frequently meet their limit in non-oxidizing acids and high-velocity seawater. This is where Monel corrosion resistance becomes the decisive factor for technical specification. As a nickel-copper solid-solution alloy,&hellip;","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts\/2732","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/comments?post=2732"}],"version-history":[{"count":1,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts\/2732\/revisions"}],"predecessor-version":[{"id":2735,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts\/2732\/revisions\/2735"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/media\/2733"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/media?parent=2732"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/categories?post=2732"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/tags?post=2732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}