Insimbi engagqwali iyingxubevange yensimbi equkethe ubuncane be-chromium obungu-10.5%. I-chromium iphendulana nomoya-mpilo osemoyeni futhi yakhe isendlalelo esivikelayo esenza insimbi engagqwali imelane kakhulu nokugqwala nokugqwala. Okwamanje, kunezinhlobo ezingaphezu kuka-150 zensimbi engagqwali emakethe.

Ngenxa yemvelo yayo ephansi yokunakekelwa, ukumelana ne-oxidation nokungcolisa, insimbi engagqwali iyathandwa ezinhlelweni eziningi, ikakhulukazi lezo lapho ubuhle bubalulekile.

Ngisho nalezi zici ezinhle, insimbi engagqwali ingagqwala futhi, 'ayinabala' hhayi 'i-stainfree'. Ezinye izinhlobo zensimbi engagqwali zijwayele ukugqwala kunezinye, kuye ngokuqukethwe kwe-chromium. Uma kuphezulu okuqukethwe kwe-chromium, mancane amathuba okuthi insimbi izogqwala.

Kodwa, ngokuhamba kwesikhathi futhi uma kungagcinwanga ngendlela efanele, ukugqwala kungakhula futhi kuzokhula ensimbini engagqwali.

Izinto Ezithinta Ukugqwala Kwensimbi Engagqwali

Izici ezihlukahlukene zingathinta ikhono lensimbi engagqwali ukumelana nokugqwala. Ukwakheka kwensimbi yiyona nto ekhathaza kakhulu uma kuziwa ekumelaneni nokugqwala. Izakhi ezikumabanga ahlukene ensimbi engagqwali zingaba nemiphumela emibi ekumelaneni nokugqwala.

Indawo lapho insimbi isetshenziswa khona ingesinye isici esingakhulisa amathuba okugqwala kwensimbi engagqwali. Indawo ene-chlorine efana namachibi okubhukuda igqwala kakhulu. Futhi, izindawo ezinamanzi anosawoti zingasheshisa ukugqwala kunsimbi engagqwali.

Okokugcina, ukunakekelwa kuzoba nomthelela emandleni ezinsimbi ukumelana nokugqwala. I-chromium esensimbini engagqwali ihlangana nomoya-mpilo emoyeni ukuze ikhiqize ungqimba oluvikelayo lwe-chromium oxide endaweni yonke. Nakuba izacile kakhulu, lolu ungqimba yilo oluvikela insimbi ekugqwaleni. Lesi sendlalelo singacekelwa phansi yizindawo ezinokhahlo noma ukulimala komshini njengokuklwebheka nokho, uma kuhlanzwa kahle futhi endaweni efanelekile, isendlalelo esivikelayo sizophinde sakheke futhi sibuyisele izakhiwo zokuzivikela.

Izinhlobo ze-Stainless Steel Corrosion

Kunezinhlobo ezahlukene zensimbi engagqwali. Ngayinye yazo iveza izinselele ezahlukene futhi idinga ukuphathwa okuhlukile.

• Ukugqwala okujwayelekile – yikhona okubikezelwayo futhi okulula ukukuphatha. Kubonakala ngokulahleka okufanayo kwendawo yonke.
• I-Galvanic Corrosion - lolu hlobo lokugqwala luthinta ama-alloys amaningi ensimbi. Kubhekiselwa esimweni lapho insimbi eyodwa ihlangana nenye futhi ibangele eyodwa noma kokubili sabelane enye kwenye futhi igle.
• I-pitting corrosion - uhlobo oluthile lokugqwala olushiya imigodi noma izimbobo. Kuvame kakhulu ezindaweni eziqukethe ama-chloride.
• Ukugqwala kweCrevice – nokugqwala kwasendaweni okwenzeka emfantwini phakathi kwezindawo ezimbili ezihlanganayo. Kungenzeka phakathi kwezinsimbi ezimbili noma insimbi nokungeyona insimbi.

Uyivimbela Kanjani Insimbi Engagqwali Ekugqwaleni

Ukugqwala kwensimbi engagqwali kungase kube ukukhathazeka futhi kubukeke kungathandeki. Insimbi yakhelwe ukumelana nokugqwala yingakho abasebenzisi abaningi besaba lapho beqala ukubona amabala nokugqwala ensimbi. Ngenhlanhla, kunezindlela ezihlukahlukene ezigabeni ezahlukene ezingasiza ekuthuthukiseni ukugqwala nokumelana nokugqwala.

Idizayini

Ukulungiselela ngesikhathi sesigaba sokuhlela, uma usebenzisa insimbi engagqwali, kungakhokha ngokuhamba kwesikhathi. Qinisekisa ukuthi insimbi isetshenziswa ezindaweni ezingenamanzi amancane ukuze kuncishiswe umonakalo ongaphezulu. Ezimweni lapho ukuthintana namanzi kungenakugwema, izimbobo zokudonsa amanzi kufanele zifakwe. Umklamo kufanele futhi uvumele ukujikeleza kwamahhala komoya ukuvimbela ukulimala ku-alloy.

Ukwenziwa

Ngesikhathi sokwenziwa, ukunakekelwa okukhethekile kufanele kuthathwe endaweni ezungezile ukuze kugwenywe ukungcoliswa kwezinye izinsimbi. Konke okuvela kumathuluzi, amayunithi okugcina, ama-turning rolls namaketanga kufanele kuqashwe ngokucophelela ukuze kungawisi ukungcola ku-alloy. Lokhu kungakhuphula ukwakheka okungenzeka kokugqwala.

Isondlo

Uma ingxubevange isifakiwe, ukunakekelwa okuvamile kuyisihluthulelo sokuvimbela ukugqwala, futhi kunciphisa ukuqhubeka kwanoma yikuphi ukugqwala okungenzeka ukuthi sekuqalile. Susa ukugqwala okwakhiwa usebenzisa izindlela zemishini noma zamakhemikhali bese uhlanza ingxubevange ngamanzi afudumele nensipho. Kufanele futhi umboze insimbi nge-coating ekwazi ukumelana nokugqwala.