Otu esi egbochi Valve site na corrosion

Electrochemical corrosion na-emebi ọla n'ụdị dị iche iche.Ọ bụghị naanị na ọ na-eme n'etiti ọla abụọ, kamakwa ọ na-emepụta ihe dị iche iche n'ihi na-adịghị mma solubility nke ngwọta, adịghị mma solubility nke oxygen, na ntakịrị ihe dị iche n'ime ime Ọdịdị nke metal, nke na-eme ka corrosion na-akawanye njọ..Ụfọdụ ọla n'onwe ha adịghị eguzogide corrosion, ma ha nwere ike ịmepụta ihe nkiri nchebe dị mma mgbe corrosion gasịrị, ya bụ, ihe nkiri passivation, nke nwere ike igbochi mmebi nke usoro.Enwere ike ịhụ na iji nweta nzube nke mgbochi-corrosion nke metal valves, otu bụ ikpochapụ electrochemical corrosion;nke ọzọ bụ ikpochapụ electrochemical corrosion;A ghaghị ịmepụta ihe nkiri na-agafe agafe na elu igwe;nke atọ bụ iji ihe na-abụghị ọla na-enweghị electrochemical corrosion kama ígwè ihe.A kọwara ọtụtụ ụzọ mgbochi corrosion n'okpuru.

1. Họrọ ihe na-eguzogide corrosion dị ka usoro si dị

Na ngalaba nke "Nhọrọ Valve", anyị webatara usoro kwesịrị ekwesị maka ihe ndị a na-ahụkarị nke valvụ, ma ọ bụ naanị mmeghe n'ozuzu.N'ime mmepụta n'ezie, corrosion nke onye na-ajụ ihe na-agbagwoju anya, ọ bụrụgodị na a na-eji ya eme ihe na-emepụta ihe na-emepụta ihe nke valve bụ otu ihe ahụ, ntinye uche, okpomọkụ na nrụgide nke usoro ahụ dị iche iche, na corrosion nke onye na-eme ihe na-eme ka ọ bụrụ ihe dị iche iche. dịkwa iche.Mgbe okpomọkụ nke ọkara na-abawanye site na 10 Celsius, ọnụ ọgụgụ corrosion na-abawanye ihe dịka 1 ruo 3 ugboro.Ntinye uche nke ọkara nwere mmetụta dị ukwuu na corrosion nke ihe valve.Dịka ọmụmaatụ, mgbe ndu dị na sulfuric acid nwere ntakịrị ntinye uche, mmebi ahụ dị ntakịrị.Mgbe ịta ahụhụ karịrị 96%, corrosion na-ebili nke ọma.N'ụzọ megidere nke ahụ, nchara carbon nwere mmebi kachasị njọ mgbe ntinye nke sulfuric acid dị ihe dịka 50%, na mgbe ịta ahụhụ na-abawanye karịa 6%, corrosion na-ebelata nke ọma.Dịka ọmụmaatụ, aluminom na-emebi emebi na nitric acid gbadoro anya nke nwere ihe karịrị 80%, mana ọ na-emebi emebi na ọkara na obere nitric acid.Ọ bụ ezie na igwe anaghị agba nchara nwere nguzogide corrosion siri ike iji mebie nitric acid, corrosion na-akawanye njọ na ihe karịrị 95% nitric acid gbadoro ụkwụ.

Enwere ike ịhụ site na ihe atụ ndị dị n'elu na nhọrọ ziri ezi nke ihe valvụ kwesịrị ịdabere na ọnọdụ ụfọdụ, nyochaa ihe dị iche iche na-emetụta corrosion, ma họrọ ihe dịka akwụkwọ ntuziaka mgbochi corrosion dị mkpa.

2. Iji ihe na-abụghị ọla

Nguzogide corrosion na-abụghị ọla dị mma.Ọ bụrụhaala na valvụ na-arụ ọrụ okpomọkụ na nrụgide na-ezute ihe ndị a chọrọ nke ihe ndị na-abụghị ọla, ọ bụghị nanị na ọ ga-edozi nsogbu corrosion, kamakwa ịchekwa ọla ndị dị oké ọnụ ahịa.A na-ejikarị ahụ valvụ, bonnet, lining, sealing surface, wdg na-emekarị ihe ndị na-abụghị ọla.Banyere gaskets, a na-ejikarị ihe ndị na-abụghị ọla eme ihe.A na-eji plastik mee ihe mkpuchi valvụ dị ka polytetrafluoroethylene na chlorinated polyether, yana roba dị ka roba eke, neoprene na nitrile roba, ebe valvụ ahụ na mkpuchi valve na-ejikarị nkedo ígwè na carbon ígwè.Ọ bụghị naanị na ọ na-eme ka ike nke valvụ ahụ dịkwuo ike, kamakwa ọ na-eme ka valvụ ahụ ghara imebi.A na-emepụtakwa valvụ pinch dabere na nguzogide corrosion kacha mma na arụmọrụ mgbanwe dị mma nke rọba.N'oge a, ọ bụ ihe ziri ezi iji naịlọn, PTFE na plastik ndị ọzọ, na roba eke na roba sịntetik na-emepụta ebe dị iche iche akara na mgbanaka akara, nke a na-eji na ụdị valves dị iche iche.Ihe ndị a na-abụghị ọla ndị a na-eji dị ka ihe mkpuchi mkpuchi ihe, ọ bụghị nanị na-eguzogide corrosion dị mma, kamakwa ezigbo ọrụ mkpuchi, karịsịa kwesịrị ekwesị maka iji mgbasa ozi na ihe.N'ezie, ike ha na nguzogide okpomọkụ dị ala, na-egbochi oke ngwa.Mpụta nke graphite na-agbanwe agbanwe emewo ka ndị na-abụghị ọla na-abanye n'ọhịa dị elu, dozie ogologo oge siri ike iji dozie nsogbu nke ịkwakọ ngwaahịa na ntanye gasket, ma bụrụ ezigbo mmanu ọkụ dị elu.

3. fesa agba

Mkpuchi bụ ụzọ mgbochi corrosion a na-ejikarị eme ihe, ọ bụkwa ihe dị mkpa na-egbochi corrosion na akara njirimara na ngwaahịa valvụ.Mkpuchi bụkwa ihe na-abụghị ọla.A na-ejikarị resin sịntetik, rọba slurry, mmanụ ihe oriri, ihe mgbaze, wdg, na-ekpuchi elu igwe iji kewapụ ihe na ikuku iji nweta ebumnuche mgbochi corrosion.A na-ejikarị mkpuchi mkpuchi eme ihe na gburugburu ebe ndị na-adịghị emebi emebi, dị ka mmiri, mmiri nnu, mmiri oké osimiri, na ikuku.A na-esekarị oghere dị n'ime valvụ ahụ na agba mgbochi corrosion iji gbochie mmiri, ikuku na mgbasa ozi ndị ọzọ na-emebi valvụ ahụ.A na-agwakọta agba ahụ na agba dị iche iche iji gosipụta ihe Fahn na-eji.A na-efesa valvụ ahụ na agba, n'ozuzu otu ugboro kwa ọnwa isii ruo otu afọ.

4. Tinye ihe mgbochi corrosion

Ịtinye obere ihe ndị ọzọ pụrụ iche na ihe ndị na-emebi emebi na ihe ndị na-emebi emebi nwere ike belata ngwa ngwa nke metal corrosion.Ihe a pụrụ iche a na-akpọ corrosion inhibitor.

Usoro nke corrosion inhibitor na-achịkwa corrosion bụ na ọ na-akwalite polarization nke batrị.A na-ejikarị ihe mgbochi corrosion eme ihe na mgbasa ozi na ihe ndochi.Ịtinye ihe mgbochi corrosion na ọkara nwere ike belata mmebi nke akụrụngwa na valves.Dịka ọmụmaatụ, igwe anaghị agba nchara chromium-nickel na sulfuric acid na-enweghị oxygen nwere ọtụtụ ihe solubility na steeti ọkụ, na corrosion dị njọ karị, mana a na-agbakwunye obere ọla kọpa sulfate ma ọ bụ nitric acid.Mgbe a na-eji oxidant, igwe anaghị agba nchara nwere ike gbanwee ka ọ bụrụ ọnọdụ na-agafe agafe, a na-emepụta ihe nkiri nchebe n'elu iji gbochie mmebi nke ọkara.Na hydrochloric acid, ọ bụrụ na agbakwunyere obere oxidant, corrosion nke titanium nwere ike ibelata.A na-ejikarị mmiri eme ihe dị ka ihe nrịbama nke nrụgide maka ule nrụgide valve, nke dị mfe ime ka mmebi valve.Ịgbakwunye ntakịrị sodium nitrite n'ime mmiri nwere ike igbochi mmiri imebi valvụ ahụ.Ngwunye asbestos nwere chlorides, nke na-emebi valvụ ahụ nke ukwuu.Ọ bụrụ na a na-eji usoro ịsacha mmiri na-ekpo ọkụ, enwere ike ibelata ọdịnaya nke chlorides.Agbanyeghị, usoro a siri ike itinye ya na enweghị ike ịkwalite ya n'ozuzu ya.Ester dị mma maka mkpa pụrụ iche.

Iji chebe valvụ valvụ ma gbochie mmebi nke nkwakọ ngwaahịa asbestos, valvụ ahụ jupụtara na corrosion inhibitor na metal àjà na nkwakọ ngwaahịa asbestos.Ihe mgbochi corrosion bụ sodium nitrite na sodium chromate, nke nwere ike ịmepụta ihe nkiri passivation n'elu valvụ valvụ ahụ iji meziwanye nguzogide corrosion nke valvụ ahụ;ihe mgbaze nwere ike jiri nwayọọ nwayọọ gbarie ihe mgbochi corrosion ma rụọ ọrụ mmanye;na asbestos Zinc ntụ ntụ na-agbakwunyere dị ka ọla eji achụ àjà.N'ezie, zinc bụkwa ihe mgbochi corrosion.Ọ nwere ike ibu ụzọ jikọta ya na chloride na asbestos, nke mere na kọntaktị dị n'etiti chloride na valvụ valvụ ahụ na-ebelata nke ukwuu, iji nweta nzube nke mgbochi corrosion.Ọ bụrụ na agbakwunyere ihe mgbochi corrosion dị ka red red na calcium lead acid na agba, ịgbasa n'elu valvụ ahụ nwere ike igbochi corrosion ikuku.

5. Electrochemical nchebe

E nwere ụdị abụọ nke nchebe electrochemical: nchebe anodic na nchebe cathodic.Ihe a na-akpọ nchebe anodic bụ iji metal nchebe dị ka anode na-ewebata ihe dị n'èzí kpọmkwem iji mee ka ikike anode dị na ntụziaka dị mma.Mgbe ọ na-abawanye na uru ụfọdụ, a na-emepụta ihe nkiri nchebe dị ukwuu n'elu ígwè anode, nke bụ ihe nkiri passivation.A na-ebelata nrụrụ nke cathodes ígwè nke ukwuu.Nchekwa anodic dabara adaba maka ọla ndị na-agafe ngwa ngwa.Ihe nchebe nke a na-akpọ cathodic pụtara na a na-eji ígwè a na-echebe eme ihe dị ka cathode, a na-etinyekwa kpọmkwem ugbu a iji belata ikike ya na ụzọ ọjọọ.Mgbe ọ ruru ụfọdụ uru nwere ike ime, a na-ebelata ọsọ nke corrosion ugbu a ma na-echekwa ígwè ahụ.Tụkwasị na nke ahụ, nchebe cathodic nwere ike ichebe ígwè a na-echebe site na ígwè nke ikike electrode dị njọ karịa nke ígwè ahụ echedoro.Ọ bụrụ na a na-eji zinc echebe ígwè, zinc na-emebi emebi, a na-akpọkwa zinc metal achụ àjà.N'ime mmepụta ihe, a na-eji nchebe anodic eme ihe dị ntakịrị, na nchebe cathodic na-ejikarị eme ihe.Nnukwu valvụ na valvụ dị mkpa na-eji usoro nchebe cathodic a, nke bụ usoro akụ na ụba, dị mfe ma dị irè.A na-agbakwunye Zinc na ihe mkpuchi asbestos iji chebe valvụ ahụ, nke bụkwa nke usoro nchebe cathodic.

6. Metal elu ọgwụgwọ

Metal elu ọgwụgwọ Filiks dị mma karịa dormant mkpuchi, elu penetration, elu ọxịdashọn passivation, wdg Nzube ya bụ melite corrosion iguzogide nke ọla na melite n'ibu ike nke ọla.A na-eji valvụ ndị a na-agwọ ihu n'elu.

A na-ejikarị galvanized valvụ njikọ skru, chrome-plated, na oxidized (blued) iji kwalite nguzogide ikuku na nke ọkara.Na mgbakwunye na ụzọ ndị a kpọtụrụ aha n'elu maka ihe nkwụnye ndị ọzọ, a na-ejikwa ọgwụgwọ elu dị ka phosphating dị ka ọnọdụ ahụ si dị.

Elu mkpuchi na akụkụ mmechi nwere obere caliber na-ejikarị usoro elu dị ka nitriding na boronizing na-emeziwanye nguzogide corrosion ya na iyi nguzogide.Diski valvụ nke 38CrMoAlA mere, oyi akwa nitrided karịrị ma ọ bụ hà nhata 0.4mm.

Nsogbu nke valve stem mgbochi corrosion bụ nsogbu ndị mmadụ na-aṅa ntị.Anyị achịkọtala ọgaranya mmepụta ahụmahụ.Usoro ọgwụgwọ elu dị ka nitriding, boronizing, chrome plating na nickel plating na-ejikarị eme ihe iji meziwanye nguzogide corrosion ya, nguzogide corrosion na nguzogide abrasion.arụrụ arụrụ arụ.Usoro ọgwụgwọ elu dị iche iche kwesịrị ịdị mma maka ihe dị iche iche valvụ na gburugburu ebe ọrụ.Akwụsị valvụ na kọntaktị na ikuku, mmiri vapor medium na asbestos packing nwere ike tinye ya na chrome siri ike na usoro nitriding gas (igwe anaghị agba nchara adịghị mma maka usoro nitriding ion);N'ime ikuku nke hydrogen sulfide, a na-eji valvụ electroplated na akwa mkpuchi nickel phosphorus, nke nwere ọrụ nchebe ka mma;38CrMoAlA nwekwara ike iguzogide corrosion site na ion na gas nitriding, ma ọ dịghị mma iji mkpuchi chromium siri ike;2Cr13 nwere ike iguzogide corrosion amonia mgbe emenyụchara na iwe ọkụ.Carbon ígwè na-eji gas nitriding na-eguzogide ọgwụ amonia corrosion, ebe niile phosphorus-nickel mkpuchi adịghị eguzogide amonia corrosion;mgbe nitriding gas, 38CrMoAlA ihe nwere ezigbo nguzogide corrosion na arụmọrụ zuru oke, a na-ejikwa ya maka ọtụtụ valvụ.

Obere valvụ dị obere na wiil aka na-ejikarị chrome-plated iji kwalite nguzogide corrosion ha ma chọọ valvụ ahụ mma.

7. Thermal spraying

Ịgba mmiri ọkụ bụ ụdị usoro ngọngọ maka ịkwadebe mkpuchi ma ghọọ otu n'ime teknụzụ ọhụrụ maka nchebe elu ihe.Ọ bụ ọrụ nkwalite isi obodo.Ọ na-eji nnukwu ike njupụta okpomọkụ isi iyi (gas combustion ire ọkụ, electric arc, plasma arc, ọkụ eletrik, gas mgbawa, wdg) na-ekpo ọkụ na gbazee metal ma ọ bụ ndị na-abụghị ọla, wee fesaa ya na pretreated isi n'elu ala. ụdị atomization na-etolite mkpuchi ịgba., ma ọ bụ kpo oku isi n'elu n'otu oge ahụ, nke mere na mkpuchi na-agbaze ọzọ n'elu nke mkpụrụ, na elu usoro ike nke ịgbado ọkụ oyi akwa na-guzobere.Ọtụtụ ọla na alloys ha, ceramik metal oxide, cermet composites, na ogige metal siri ike ka enwere ike kpuchie ya na ọla ma ọ bụ nke na-abụghị ọla site na otu ụzọ ịgbasa ọkụ ma ọ bụ karịa.

Ịfesa okpomọkụ nwere ike imeziwanye nguzogide corrosion nke elu ya, na-eyi nguzogide, oke okpomọkụ na ihe ndị ọzọ, na-agbatị ndụ ọrụ ya.Thermal spray mkpuchi na ọrụ pụrụ iche nwere ihe pụrụ iche dị ka okpomọkụ mkpuchi, mkpuchi (ma ọ bụ ọkụ eletrik dị iche iche), grindable sealing, onwe-lubricating, okpomọkụ radieshon, electromagnetic shielding, wdg;Enwere ike ịrụzi akụkụ site na spraying thermal.

8. Jikwaa ebe na-emebi emebi

Ihe a na-akpọ gburugburu ebe obibi nwere uche abụọ sara mbara na mmetụta dị warara.Ebe sara mbara na-ezo aka na gburugburu ebe obibi gburugburu ebe nrụnye valve na mgbasa ozi dị n'ime ya;gburugburu mmetụta uche dị warara na-ezo aka na ọnọdụ gburugburu ebe ntinye valve.Ọtụtụ gburugburu enweghị ike ịchịkwa yana usoro mmepụta enweghị ike ịgbanwe aka ike.Naanị na ọ bụrụ na ọ gaghị emebi ngwaahịa, usoro, wdg, usoro nke ịchịkwa gburugburu ebe obibi nwere ike iji mee ihe, dị ka deoxidizing mmiri mmiri ọkụ, na-edozi uru pH nke alkali ụlọ na nhazi nhazi, wdg. N'echiche a, ihe ndị a kpọtụrụ aha n'elu nke ihe mgbochi corrosion, nchebe electrochemical, wdg na-achịkwakwa gburugburu ebe obibi corrosion.

Igwe ikuku juputara na uzuzu, uzuzu mmiri na anwụrụ ọkụ, ọkachasị na gburugburu ebe a na-emepụta ihe, dị ka halogen anwụrụ ọkụ, gas na-egbu egbu na ezigbo ntụ ntụ nke akụrụngwa na-ebupụta, nke ga-emebi valvụ ahụ n'ọkwa dị iche iche.Ndị na-arụ ọrụ kwesịrị ịsacha ma na-ehicha valvụ mgbe niile ma na-agbanye mmanụ mgbe niile dịka ụkpụrụ dị na usoro ọrụ si dị, nke bụ usoro dị irè iji chịkwaa mmebi gburugburu ebe obibi.A na-etinye valvụ valvụ ahụ na mkpuchi nchebe, a na-etinye valvụ ala n'ime ala nke ọma, na valvụ ahụ na-efesa ya na agba, wdg, bụ ụzọ niile iji gbochie mmebi nke valvụ ahụ ka ọ ghara inwe ihe ndị na-emebi emebi.Okpomọkụ dị elu na mmetọ ikuku, ọkachasị maka akụrụngwa na valvụ na gburugburu mechiri emechi, ga-eme ka nrụrụ ha dịkwuo elu.Ụlọ ọrụ mepere emepe ma ọ bụ ikuku ventilashị na usoro jụrụ oyi kwesịrị ka ewere ya dị ka o kwere mee iji belata corrosion gburugburu ebe obibi.

9. Meziwanye nkà na ụzụ nhazi na nhazi valve

Mgbochi mgbochi nke valvụ bụ nsogbu a na-atụle site na nhazi ahụ, ngwaahịa valvụ nke nwere ụkpụrụ nhazi ezi uche dị na ya na usoro nhazi ziri ezi.Obi abụọ adịghị ya na ọ nwere mmetụta dị mma na-ebelata mmebi nke valvụ ahụ.