{"id":1367,"date":"2024-11-26T14:26:38","date_gmt":"2024-11-26T06:26:38","guid":{"rendered":"https:\/\/www.tflequip.com\/?p=1367"},"modified":"2024-11-26T14:26:38","modified_gmt":"2024-11-26T06:26:38","slug":"why-does-stainless-steel-rust-and-corrode","status":"publish","type":"post","link":"https:\/\/www.tflequip.com\/lv\/why-does-stainless-steel-rust-and-corrode\/","title":{"rendered":"K\u0101p\u0113c ner\u016bs\u0113jo\u0161ais t\u0113rauds r\u016bs\u0113 un korod\u0113?"},"content":{"rendered":"

K\u0101p\u0113c ner\u016bs\u0113jo\u0161ais t\u0113rauds korod\u0113 un r\u016bs\u0113? Kad uz ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda virsmas par\u0101d\u0101s br\u016bni r\u016bsas plankumi (punkti), cilv\u0113ki ir \u013coti p\u0101rsteigti: vi\u0146i dom\u0101, ka ner\u016bs\u0113jo\u0161ais t\u0113rauds ner\u016bs\u0113 un ner\u016bs\u0113, un, ja tas ner\u016bs\u0113 un ner\u016bs\u0113, tas nav ner\u016bs\u0113jo\u0161ais t\u0113rauds, un liel\u0101kajai da\u013cai t\u0113rauda ir probl\u0113mas. Paties\u012bb\u0101 tas ir vienpus\u0113js un nepareizs uzskats, kuram tr\u016bkst izpratnes par ner\u016bs\u0113jo\u0161o t\u0113raudu. Noteiktos apst\u0101k\u013cos ner\u016bs\u0113jo\u0161ais t\u0113rauds ar\u012b korod\u0113 un r\u016bs\u0113.<\/p>\n

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1. Attiec\u012bgos apst\u0101k\u013cos ner\u016bs\u0113jo\u0161ais t\u0113rauds ar\u012b korod\u0113.<\/p>\n

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Ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda izmanto\u0161anas scen\u0101riji ir \u013coti sare\u017e\u0123\u012bti, un viena hroma oks\u012bda pasiv\u0101cijas pl\u0113ve nevar apmierin\u0101t augstas iztur\u012bbas pret koroziju pras\u012bbas. T\u0101p\u0113c, \u0146emot v\u0113r\u0101 pielietojuma jomas at\u0161\u0137ir\u012bbas, t\u0113raudam j\u0101pievieno t\u0101di elementi k\u0101 molibd\u0113ns (Mo), var\u0161 (Cu) un sl\u0101peklis (N), lai uzlabotu pasiv\u0101cijas pl\u0113ves sast\u0101vu un v\u0113l vair\u0101k uzlabotu ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda iztur\u012bbu pret koroziju. Pievienojot Mo, \u0146emot v\u0113r\u0101, ka korozijas produkts MoO2- ir tuvu matricai un sp\u0113c\u012bgi veicina matricas pasiv\u0101ciju, nov\u0113r\u0161ot matricas koroziju; pievienojot Cu, pasiv\u0101cijas pl\u0113ve uz ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda virsmas satur CuCl, jo t\u0101 nerea\u0123\u0113 ar koroz\u012bv\u0101m viel\u0101m un uzlabo iztur\u012bbu pret koroziju; pievienojot N, \u0146emot v\u0113r\u0101, ka pasiv\u0101cijas pl\u0113ve ir bag\u0101tin\u0101ta ar Cr2N, Cr koncentr\u0101cija pasiv\u0101cijas pl\u0113v\u0113 palielin\u0101s, t\u0101d\u0113j\u0101di uzlabojot ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda iztur\u012bbu pret koroziju.<\/p>\n

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Ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda iztur\u012bba pret koroziju ir nosac\u012bta. Ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda kategorija ir iztur\u012bga pret koroziju noteikt\u0101 vid\u0113, bet t\u0101 tiks boj\u0101ta cit\u0101 vid\u0113. Taj\u0101 pa\u0161\u0101 laik\u0101 ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda iztur\u012bba pret koroziju ir relat\u012bva. L\u012bdz \u0161im nav ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda, kas nekad ner\u016bs\u0113tu vis\u0101s vid\u0113s.<\/p>\n

\".jpg\"<\/p>\n

2. Ner\u016bs\u0113jo\u0161ais t\u0113rauds nav neiesp\u0113jami korod\u0113t un r\u016bs\u0113t<\/p>\n

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Uz virsmas veidojas ar\u012b oks\u012bds. Iemesls, k\u0101p\u0113c visi tirg\u016b pieejamie ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda materi\u0101li ir ner\u016bs\u0113jo\u0161i, ir Cr elementa kl\u0101tb\u016btne. Galvenais ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda iztur\u012bbas pret koroziju iemesls (princips) ir pasiv\u0101cijas pl\u0113ves koncepcija. Vienk\u0101r\u0161\u0101k sakot, pasiv\u0101cijas pl\u0113ve ir pl\u0113ve, kas sast\u0101v galvenok\u0101rt no Cr2O3 un p\u0101rkl\u0101j ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda materi\u0101la virsmu. \u0160\u012bs pl\u0113ves d\u0113\u013c ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda matricas korozija da\u017e\u0101d\u0101s vid\u0113s ir ierobe\u017eota. \u0160o situ\u0101ciju sauc par pasiv\u0101ciju. Past\u0101v divas situ\u0101cijas, kad rodas \u0161\u0101da veida pasiv\u0101cijas pl\u0113ve. Viena ir t\u0101da, ka ner\u016bs\u0113jo\u0161ajam t\u0113raudam pa\u0161am ir pa\u0161pasiv\u0101cijas sp\u0113ja. \u0160\u012b pa\u0161pasiv\u0101cijas sp\u0113ja pa\u0101trin\u0101s, palielinoties hroma saturam, t\u0101p\u0113c tas ir iztur\u012bgs pret r\u016bsu; otrs bie\u017e\u0101k sastopamais ra\u017eo\u0161anas st\u0101voklis ir t\u0101ds, ka ner\u016bs\u0113jo\u0161ais t\u0113rauds rada pasiv\u0101cijas pl\u0113vi, korod\u0113jot da\u017e\u0101dos \u016bdens \u0161\u0137\u012bdumos (elektrol\u012btos), t\u0101d\u0113j\u0101di ierobe\u017eojot koroziju. Ja pasiv\u0101cijas pl\u0113ve tiek boj\u0101ta, nekav\u0113joties var izveidot jaunu pasiv\u0101cijas pl\u0113vi.<\/p>\n

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Ir tr\u012bs iemesli, k\u0101p\u0113c ner\u016bs\u0113jo\u0161\u0101 t\u0113rauda pasiv\u0101cijas pl\u0113vei ir sp\u0113ja pretoties korozijai: pirmk\u0101rt, pasiv\u0101cijas pl\u0113ves biezums ir \u013coti pl\u0101ns, kas vid\u0113 ar hroma saturu > 10 var b\u016bt tikai da\u017ei mikroni.5%; otrk\u0101rt, pasiv\u0101cijas pl\u0113ves \u012bpatn\u0113jais svars ir liel\u0101ks nek\u0101 substr\u0101ta \u012bpatn\u0113jais svars; \u0161\u012bs divas \u012bpa\u0161\u012bbas nor\u0101da, ka pasiv\u0101cijas pl\u0113ve ir gan pl\u0101na, gan bl\u012bva, t\u0101p\u0113c ir gr\u016bti pasiv\u0101cijas pl\u0113vei iek\u013c\u016bt koroz\u012bv\u0101 vid\u0113, lai \u0101tri sar\u016bs\u0113tu substr\u0101tu; tre\u0161\u0101 \u012bpa\u0161\u012bba ir t\u0101, ka hroma koncentr\u0101cija pasiv\u0101cijas pl\u0113v\u0113 ir vair\u0101k nek\u0101 tr\u012bs reizes liel\u0101ka nek\u0101 substr\u0101t\u0101; t\u0101p\u0113c pasiv\u0101cijas pl\u0113vei ir augsta iztur\u012bba pret koroziju.<\/p>\n

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Ner\u016bs\u0113jo\u0161ajam t\u0113raudam piem\u012bt sp\u0113ja pretoties atmosf\u0113ras oksid\u0101cijai, tas ir, ner\u016bs\u0113jo\u0161ais t\u0113rauds, un tam piem\u012bt ar\u012b sp\u0113ja ner\u016bs\u0113t vid\u0113, kas satur sk\u0101bes, s\u0101rmus un s\u0101\u013cus, tas ir, iztur\u012bba pret koroziju. Tom\u0113r t\u0101 iztur\u012bba pret koroziju at\u0161\u0137iras atkar\u012bb\u0101 no pa\u0161a t\u0113rauda \u0137\u012bmisk\u0101 sast\u0101va, aizsardz\u012bbas st\u0101vok\u013ca, pielietojuma jomas un apk\u0101rt\u0113j\u0101s vides vides veida. Piem\u0113ram, 304 t\u0113rauda caurul\u0113m ir sal\u012bdzino\u0161i laba iztur\u012bba pret koroziju saus\u0101 un t\u012br\u0101 vid\u0113, bet, ja t\u0101s p\u0101rvieto uz piekrastes zon\u0101m, t\u0101s \u0101tri r\u016bs\u0113 j\u016bras migl\u0101, kas satur vair\u0101k s\u0101ls; savuk\u0101rt 316 t\u0113rauda caurules darbojas labi. T\u0101p\u0113c ne viss ner\u016bs\u0113jo\u0161ais t\u0113rauds ir iztur\u012bgs pret koroziju un ner\u016bs\u0113 vis\u0101s vid\u0113s.<\/p>","protected":false},"excerpt":{"rendered":"

Why does stainless steel corrode and rust? When brown rust spots (dots) appear on the surface of stainless steel, people are very surprised: they think that stainless steel will not corrode and rust, and if it corrodes and rusts, it is not stainless steel, and most of the steel has problems. In fact, this is […]<\/p>","protected":false},"author":4,"featured_media":1368,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[36],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/www.tflequip.com\/lv\/wp-json\/wp\/v2\/posts\/1367"}],"collection":[{"href":"https:\/\/www.tflequip.com\/lv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tflequip.com\/lv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tflequip.com\/lv\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tflequip.com\/lv\/wp-json\/wp\/v2\/comments?post=1367"}],"version-history":[{"count":0,"href":"https:\/\/www.tflequip.com\/lv\/wp-json\/wp\/v2\/posts\/1367\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tflequip.com\/lv\/wp-json\/wp\/v2\/media\/1368"}],"wp:attachment":[{"href":"https:\/\/www.tflequip.com\/lv\/wp-json\/wp\/v2\/media?parent=1367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tflequip.com\/lv\/wp-json\/wp\/v2\/categories?post=1367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tflequip.com\/lv\/wp-json\/wp\/v2\/tags?post=1367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}