Iyini i-Passivation of Stainless Steel?

Insimbi engagqwali yaziswa kakhulu ngenxa yokumelana nokugqwala kanye nokubukeka kwayo okuhlanzekile, kwesimanje. Kodwa ngisho nale nto ehlala isikhathi eside iyazuza ekwelashweni okwengeziwe ukuze kuthuthukiswe ukumelana nokugqwala kwayo - inqubo eyaziwa ngokuthiukuthatheka. Lokhu kwelashwa ngamakhemikhali kudlala indima ebalulekile ekwandiseni ubude besikhathi eside nokusebenza kwensimbi engagqwali kuzo zonke izimboni.

Kulesi sihloko, sichaza ukuthi yini i-passivation, ukuthi isebenza kanjani, kungani ibalulekile, nokuthi isetshenziswa kuphi kakhulu. Njengomhlinzeki oholayo wensimbi engagqwali,sakysteelinikeza kokubili imikhiqizo yensimbi engagqwali engadluliswanga nengafakwanga eyenzelwe ukuhlangabezana namazinga omhlaba.

Kuyini Passivation

I-Passivation inqubo yamakhemikhali esusa insimbi yamahhala nokunye ukungcola okungaphezulu ensimbi engagqwali. Ngemva kokuhlanza, insimbi iphathwa nge-oxidant emnene, ngokuvamile i-nitric acid noma i-citric acid, ukukhuthaza ukwakheka kongqimba oluncane lwe-oxide obala ebusweni.

Lesi singqimba esivikelayo sithuthukisa kakhulu ukumelana kwensimbi nokugqwala nokugqwala ngokuvimbela amasayithi asebenzayo aholela ekuhlanganeni kwamakhemikhali nemvelo.

I-passivation ayiyona into yokugqoka noma i-plating. Kunalokho, ithuthukisa izici zemvelo zokuvikela zensimbi engagqwali ngokuvumela okuqukethwe kwayo kwe-chromium ukuthi kwakhe ungqimba oluzinzile lwe-passive oxide.

Isebenza kanjani i-passivation

Inqubo ngokuvamile ihilela izinyathelo ezintathu eziyinhloko:

1. Ukuhlanza
   Wonke amafutha, amafutha, kanye nemfucumfucu kufanele kususwe kusetshenziswa izihlanzi ezine-alkaline noma ezincibilikisiwe. Lokhu kuqinisekisa ukuthi ukugeza kwe-asidi kungathinta indawo yensimbi engenalutho.

2. Ukugeza Nge-Acid Ukwelashwa
   Insimbi engagqwali ibe isicwiliswa engxube ye-asidi edlulayo, njenge-nitric noma i-citric acid. Lokhu kususa insimbi engaphezulu futhi kubangele ukwakheka kongqimba lwe-chromium oxide engenzi lutho.

3. Ukugeza kanye Nokomisa
   Ngemuva kokugeza kwe-asidi, impahla ihlanjululwa kahle ngamanzi angcolile futhi yomisiwe. Lokhu kuqinisekisa ukuthi akukho acid noma ukungcola okuhlala kungaphezulu.

Umphumela uba indawo ebushelelezi, nezinzile kumakhemikhali ezimelana nokugqwala ngisho nasezimweni ezinzima.

Kungani I-Passivation Ibalulekile

Nakuba insimbi engagqwali iqukethe i-chromium futhi isivele imelana nokugqwala, ukucutshungulwa kwemishini njengokusika, ukushisela, noma ukukhanda kungaletha insimbi yamahhala phezulu. Lezi zinhlayiya zensimbi zingadala ukugqwala kwendawo uma zingasuswa.

I-Passivation ibuyisela ubuqotho bendawo yensimbi ngokuthi:

• Ukususa ukungcola

• Ukuthuthukisa ukumelana nokugqwala

• Ukuthuthukisa ukuqina ezindaweni ezinolaka

• Ukusekela ikamelo lokuhlanza kanye nezindinganiso zenhlanzeko

Ezimbonini ezifana nokucubungula ukudla, ezemithi, kanye ne-aerospace, ukudlula akunconywa nje kuphela - kuyadingeka.

Izicelo Ezivamile Zensimbi Engagqwali Ye-Pasivated

I-Passivation isetshenziswa kakhulu emikhakheni efuna ukumelana nokugqwala nokuhlanzeka kwesikhathi eside. Ezinye izibonelo zihlanganisa:

• Izisetshenziswa Zokucubungula Ukudla Neziphuzo
  Ukuvimbela ukungcola kanye nokukhula kwamagciwane ezindaweni ezihlanzekile.

• Amadivayisi Emithi Nezokwelapha
  Izinsimbi nezinto zokuhlinza kumele zingasebenzi futhi zingagqwali.

• Imboni kawoyela negesi
  Ukwelula isikhathi sokuphila sezingxenye ezichayeke kumakhemikhali, amanzi anosawoti, noma umswakama ophezulu.

• Ukukhiqiza I-Semiconductor
  Izindawo ezihlanzeke kakhulu zinciphisa ukungcoliswa kwezinhlayiyana ezindaweni ezibucayi.

sakysteelIhlinzeka ngezinto zensimbi engagqwali ezingashintshiwe ezihlangabezana ne-ASTM A967 namanye amazinga omhlaba, isekela amakhasimende kuzo zonke lezi zimboni ezidinga kakhulu.

Amazinga Nemininingwane

Inqubo ye-passivation ibuswa izindinganiso zamazwe ngamazwe ezimbalwa ezichaza izinqubo ezihamba phambili, izindlela zokuhlola, nokusetshenziswa kwamakhemikhali. Lokhu kubandakanya:

• I-ASTM A967: Ukucaciswa okujwayelekile kokwelashwa kwe-chemical passivation yezingxenye zensimbi engagqwali

• I-ASTM A380: Imihlahlandlela yokuhlanza, ukwehlisa, nokudlula

• I-ISO 16048: Izinga le-International passivation

Lawa mazinga aqinisekisa ukuthi inqubo yenziwa ngendlela efanele futhi indawo yokugcina ihlangabezana nezidingo zokumelana nokugqwala.

Ungasho Kanjani Uma Insimbi Engagqwali Idlulisiwe

Insimbi engagqwali edlulisiwe ayibukeki ihluke kakhulu ngeso lenyama. Kodwa-ke, ukuhlolwa okukhethekile okufana nokuhlolwa kwe-copper sulfate, ukuchayeka komswakama ophezulu, noma ukuhlolwa kwesifutho sikasawoti kungaqinisekisa ukuthi ungqimba lwe-passive lukhona yini futhi lusebenza kahle.

Ezinye izimboni zidinga isitifiketi esibalulekile sokungaphumeleli.sakysteelinikeza imibhalo egcwele kanye nemibiko yokuhlola yemikhiqizo engavunyelwe uma iceliwe.

Izinzuzo Passivation

Ukufingqa, izinzuzo ezibalulekile ze-stainless steel passivation zihlanganisa:

• Ukumelana okuthuthukisiwe kokugoba nokugqwala

• Impilo ende yesevisi yezingxenye

• Izindawo ezihlanzekile nezihlanzeke kakhulu

• Ukusebenza okuthuthukisiwe ezindaweni zamakhemikhali noma ezinosawoti

• Ukuhambisana nezindinganiso zemboni yomhlaba wonke

Ngokutshala imali ezintweni ezingavunyelwe, amabhizinisi anciphisa izindleko zokulungisa, athuthukise ukuphepha, futhi andise ukwethembeka kwemishini.

Isiphetho

I-passivation iyinqubo ebalulekile ekwelapheni insimbi engagqwali, ikakhulukazi ezisetshenziswa lapho ukumelana nokugqwala nokuhlanzeka kubalulekile. Ngokususa ukungcola okungaphezulu nokuthuthukisa isendlalelo se-oxide evikelayo, le nqubo ivumela insimbi engagqwali ukuthi isebenze kahle kakhulu.

Noma ngabe udinga amapayipi angashintshiwe, okokufakwayo, amathangi, noma izingxenye zangokwezifiso,sakysteelingakunikeza izixazululo ezihlangabezana nezidingo zakho eziqondile kanye nezidingo zokuthobela imboni. Xhumana nethimba lethu ukuze ufunde kabanzi mayelana namasevisi ethu okucubungula insimbi engagqwali nokuthi singasiza kanjani ekuthuthukiseni iphrojekthi yakho elandelayo.