Nrụrụ aka bụ mbibi ma ọ bụ mmebi nke ihe ma ọ bụ ihe onwunwe ha nke gburugburu ebe obibi kpatara.Ọtụtụ nrụrụ na-apụta na gburugburu ikuku, nke nwere ihe ndị na-emebi emebi na ihe ndị na-emebi emebi dị ka oxygen, iru mmiri, mgbanwe okpomọkụ na mmetọ.
Cyclic Corrosion bụ ihe na-emekarị na nke na-emebi ikuku corrosion.Cyclic Corrosion corrosion n'elu metal ihe bụ n'ihi na chloride ion ẹdude ke metal elu nke oxidized oyi akwa na-echebe oyi akwa nke metal elu penetration na esịtidem metal electrochemical mmeghachi omume kpatara.N'otu oge ahụ, chlorine ion nwere ụfọdụ hydration ume, mfe adsorbed na pores nke metal elu, cracks juru n'ọnụ ma dochie oxygen na oxide oyi akwa, insoluble oxides n'ime soluble chlorides, nke mere na passivation nke steeti. elu n'ime elu na-arụ ọrụ.
Nnwale cyclic corrosion bụ ụdị ule gburugburu ebe obibi tumadi na-eji akụrụngwa ule cyclic corrosion mepụta simulation artificial nke ọnọdụ gburugburu ebe obibi cyclic corrosion iji chọpụta nguzogide corrosion nke ngwaahịa ma ọ bụ ihe igwe.E kewara ya ụzọ abụọ, otu maka nnwale mkpughe gburugburu ebe obibi, nke ọzọ maka ịme anwansị ngwa ngwa nke nnwale gburugburu cyclic Corrosion.
Ngosipụta artificial nke ule gburugburu cyclic corrosion bụ iji ụfọdụ olu nke akụrụngwa ule ohere - ụlọ nyocha nke cyclic corrosion (Figure), na oke oghere ya nwere ụzọ aka aka, na-ebute gburugburu cyclic corrosion iji chọpụta ogo Cyclic nke ngwaahịa ahụ. Nguzogide corrosion corrosion.
A na-atụnyere ya na gburugburu ebe obibi, ntinye nnu nke chloride nke gburugburu cyclic corrosion, nwere ike ịbụ ọtụtụ oge ma ọ bụ ọtụtụ oge gburugburu ebe obibi n'ozuzu ọdịnaya Cyclic Corrosion, nke mere na ọnụ ọgụgụ corrosion na-abawanye nke ukwuu, ule Cyclic Corrosion na cyclic corrosion. ngwaahịa, oge iji nweta nsonaazụ na-ebelata nke ukwuu.Dị ka ọ dị na gburugburu mkpughe nke okike maka ule nlele ngwaahịa, ịbụ corrosion ya nwere ike were 1 afọ, ebe n'ime simulation artificial nke ọnọdụ gburugburu ebe obibi cyclic Corrosion, ọ bụrụhaala na awa 24, ị nwere ike nweta nsonaazụ yiri ya.
Enwere ike kewaa ụlọ nyocha cyclic corrosion n'ụdị anọ
(1)Nnwale corrosion na-anọpụ iche (NSS)bụ usoro nnwale corrosion siri ike nke pụtara na mbụ ma bụrụkwa nke a na-ejikarị eme ihe ugbu a.Ọ na-eji 5% sodium chloride saline solution, ngwọta PH uru na-agbanwe na nso nso (6.5 ~ 7.2) dị ka ihe ngwọta maka spraying.A na-ewere ọnọdụ ule ahụ 35 ℃, ọnụego mmezi nke Cyclic Corrosion chọrọ na 1 ~ 2ml / 80cm / h.
(2)Acetic acid cyclic corrosion test (ASS test)emepụtara na ndabere nke nnwale cyclic corrosion na-anọpụ iche.Ọ bụ ịgbakwunye glacial acetic acid na 5% sodium chloride ngwọta, nke mere na PH uru nke ngwọta na-ebelata ihe dị ka 3, ngwọta na-aghọ acidic, na ikpeazụ e guzobere Cyclic Corrosion na-agbanwekwa na-anọpụ iche Cyclic Corrosion na acidic. .Ọnụego corrosion ya dị ihe dị ka ugboro atọ ọsọ ọsọ karịa ule NSS.
(3)Nnwale nnu ọla kọpa gbara acetic acid cyclic corrosion test (Nnwale CASS)bụ nnwale ọhụrụ cyclic corrosion nke mba ofesi mepere emepe, nnwale nnwale nke 50 ℃, ngwọta nnu nwere ntakịrị nnu ọla kọpa - ọla kọpa chloride, corrosion siri ike kpata.Ọnụego corrosion ya dị ihe dị ka okpukpu asatọ karịa nke ule NSS.
(4)Nnwale corrosion cyclic ọzọbụ ule cyclic corrosion zuru oke, nke na-anọpụ iche ule cyclic corrosion gbakwunyere iru mmiri na ule okpomọkụ.A na-ejikarị ya eme ihe maka oghere-ụdị ngwaahịa dum, site na ntinye nke gburugburu iru mmiri, nke mere na Cyclic Corrosion abụghị nanị na-emepụta n'elu ngwaahịa ahụ, kamakwa n'ime ngwaahịa ahụ.Ọ bụ ngwaahịa dị na Cyclic Corrosion na iru mmiri na-ekpo ọkụ na ọnọdụ gburugburu ebe obibi abụọ n'otu n'otu, ma n'ikpeazụ nyochaa njirimara eletriki na ígwè ọrụ nke ngwaahịa ahụ dum na-eji ma ọ bụ na-enweghị mgbanwe.
A na-enye nsonaazụ ule nke ule cyclic corrosion n'ụdị qualitative karịa n'ụdị ọnụọgụ.Enwere ụzọ ikpe anọ akọwapụtara.
①usoro ikpebụ mpaghara corrosion na ngụkọta nke oke nke pasent dị ka usoro ụfọdụ nke nkewa n'ime ọtụtụ ọkwa, na ọkwa ụfọdụ dị ka usoro ikpe ruru eru, ọ dị mma maka nlele ewepụghị maka nyocha.
②usoro ikpe ziri ezibụ site na arọ nke sample tupu na mgbe corrosion ule usoro-atụ, gbakọọ arọ nke ọnwụ nke corrosion ikpe àgwà nke sample corrosion eguzogide, ọ bụ karịsịa adabara a metal corrosion eguzogide àgwà ntule.
③usoro ikpebi ọdịdị anya rụrụ arụbụ usoro mkpebi qualitative, ọ bụ ule cyclic corrosion, ma ngwaahịa ahụ na-emepụta ihe nrụrụ iji chọpụta ihe nlele ahụ, ụkpụrụ ngwaahịa izugbe na-ejikarị na usoro a.
④usoro nyocha ọnụ ọgụgụ corrosion datana-enye nhazi nke ule corrosion, nyocha nke data corrosion, data corrosion iji chọpụta ọkwa ntụkwasị obi nke usoro ahụ, nke a na-ejikarị enyocha, nchịkọta ọnụ ọgụgụ corrosion, karịa kpọmkwem maka ikpe njirimara ngwaahịa.
Nnwale cyclic corrosion nke igwe anaghị agba nchara
Emepụtara ule cyclic corrosion na mmalite narị afọ nke iri abụọ, bụ ojiji kachasị ogologo nke "nnwale corrosion", ihu ọma onye ọrụ na-eguzogide corrosion nke ukwuu, abụrụla ule "ụwa niile".Isi ihe kpatara ya bụ: ① na-echekwa oge;② ọnụ ala dị ala;③ nwere ike ịnwale ihe dị iche iche;④ nsonaazụ ya dị mfe ma doo anya, dị mma maka idozi esemokwu azụmahịa.
Na omume, ule cyclic corrosion nke igwe anaghị agba nchara bụ nke a kacha mara amara - awa ole ka ihe a nwere ike nwale cyclic corrosion?Ndị ọkachamara agaghị abụ onye ọhụrụ na ajụjụ a.
Ndị na-ere ihe na-ejikarị eme ihengafeọgwụgwọ ma ọ bụmelite ọkwa polishing elu, wdg, iji melite oge ule Cyclic Corrosion nke igwe anaghị agba nchara.Otú ọ dị, ihe kachasị mkpa na-achọpụta bụ ihe mejupụtara igwe anaghị agba nchara n'onwe ya, ya bụ ọdịnaya nke chromium, molybdenum na nickel.
Ka ọdịnaya nke ihe abụọ ahụ dị elu, chromium na molybdenum, ka arụrụ ọrụ corrosion siri ike dị mkpa iji guzogide pitting na crevice corrosion na-amalite ịpụta.A na-egosipụta nguzogide corrosion a n'ihe a na-akpọNguzogide Mgbochi Dakọtara(PRE) uru: PRE = %Cr + 3.3 x %Mo.
Ọ bụ ezie na nickel adịghị eme ka nguzogide ígwè dị na pitting na crevice corrosion, ọ nwere ike belata ọnụ ọgụgụ corrosion nke ọma mgbe usoro mmebi ahụ malitechara.Nchara igwe anaghị agba nchara nke nwere nickel ya mere na-arụ ọrụ nke ọma na ule Cyclic Corrosion, na-emebikwa nke ukwuu karịa igwe anaghị agba nchara nickel ferritic dị ala nwere nguzogide yiri nke ahụ na-emebi corrosion kwekọrọ.
Trivia: Maka ọkọlọtọ 304, corrosion cyclic na-anọpụ iche na-adịkarị n'etiti awa 48 na 72;maka ọkọlọtọ 316, cyclic corrosion na-anọpụ iche na-adịkarị n'etiti awa 72 na 120.
Okwesiri iburu n'uche nankeCorrosion cyclicule nwere nnukwu ihe ndọghachi azụ mgbe a na-anwale njirimara igwe anaghị agba nchara.Ọdịnaya chloride nke Cyclic Corrosion na ule cyclic corrosion dị oke elu, karịa ezigbo gburugburu ebe obibi, yabụ igwe anaghị agba nchara nke nwere ike iguzogide corrosion na ebe ngwa ngwa nwere obere chloride dị ala ga-emebikwa na ule Cyclic Corrosion. .
Nnwale cyclic corrosion na-agbanwe omume corrosion nke igwe anaghị agba nchara, enweghị ike iwere ya dị ka nnwale agbagoro ngwa ngwa ma ọ bụ nnwale simulation.Nsonaazụ bụ otu akụkụ na enweghị njikọ kwekọrọ na arụmọrụ nke igwe anaghị agba nchara nke emechara tinye n'ọrụ.
Ya mere, anyị nwere ike iji ule Cyclic Corrosion tụnyere nguzogide corrosion nke ụdị igwe anaghị agba nchara dị iche iche, mana ule a nwere ike ịlele ihe ahụ.Mgbe ị na-ahọrọ ihe igwe anaghị agba nchara kpọmkwem, ule Cyclic Corrosion naanị anaghị enyekarị ozi zuru oke, n'ihi na anyị enweghị nghọta zuru oke nke njikọ dị n'etiti ọnọdụ ule na gburugburu ngwa ngwa.
Maka otu ihe kpatara ya, ọ gaghị ekwe omume ịtụle ndụ ọrụ nke ngwaahịa dabere naanị na ule Cyclic Corrosion nke ihe nlele igwe anaghị agba nchara.
Tụkwasị na nke a, ọ gaghị ekwe omume iji tụnyere ụdị ígwè dị iche iche, dịka ọmụmaatụ, anyị enweghị ike iji igwe anaghị agba nchara tụnyere carbon ígwè, n'ihi na usoro corrosion nke ihe abụọ a na-eji na ule ahụ dị nnọọ iche, na njikọ dị n'etiti. nsonaazụ ule na gburugburu ebe ngwaahịa ga-ejedebe na-eji abụghị otu.
Oge nzipu: Nov-06-2023