Kune michina, makemikari, uye electrochemical nzira dzekubvisa iyo oxide chiyero chehutsanana simbi mapaipi.

Nekuda kwekuoma kweiyo oxide scale kuumbwa kwehutsanana Stainless simbi mapaipi, hazvisi nyore kubvisa oxide sikero pamusoro, asiwo kuita pamusoro pakakwirira kusvika pamwero wehutsanana uye kutsvedzerera.Kubviswa kwechikero cheokisidhi papombi dzesimbi dzisina tsvina dzinowanzotora matanho maviri, imwe ndeye pretreatment, uye danho rechipiri kubvisa dota uye slag.

Iyo oxide scale pretreatment ye sanitary Stainless simbi pombi inoita kuti oxide scale irasikirwe, uye zvino zviri nyore kubvisa nekunhonga.Pretreatment inogona kukamurwa kuva nzira dzinotevera: alkaline nitrate kunyungudutsa kurapwa nzira.Alkaline melt ine 87% hydroxide uye 13% nitrate.Huyero hwezviviri mumunyu wakanyungudutswa hunofanira kunyatsodzorwa kuitira kuti munyu wakanyunguduka uve nesimba rakasimba rekuita oxidizing, nzvimbo yekunyunguduka, uye zvishoma viscosity.Mukugadzira maitiro, chete sodium nitrate yemukati haisi pasi pe8% (wt).Kurapa kunoitwa muchoto chekugezera munyu, kutonhora kuri 450 ~ 470℃, uye nguva ndeye 5 maminetsi e ferritic Stainless simbi uye 30 maminetsi eaustenitic Stainless simbi.Saizvozvo, iron oxides uye spinels inogona zvakare kuve ne oxidized ne nitrate uye inorasikirwa ne trivalent iron oxides, iyo inobviswa nyore nyore ne pickling.Pamusana pekupisa kwepamusoro-soro, maokisidhi anoonekwa anobviswa zvishoma uye anonyura mubhati nenzira yematope.Pasi pechoto.

Alkaline nitrate inonyungudutsa pretreatment process: steam degreasing→preheating (150 ~ 250℃, nguva 20 ~ 30min)→yakanyungudutswa munyu kurapwa→kudonha kwemvura→kugeza mvura inopisa.Kugadziriswa kwemunyu kwakanyungudutswa hakuna kukodzera magungano ane weld gaps kana crimping.Kana zvikamu zvabviswa kubva muchoto chemunyu chakanyungudutswa uye mvura yakadzimwa, mhute inopinza alkali uye munyu inopfapfaidzwa, saka iyo yakadzika don type inofanirwa kugamuchirwa yekudzima mvura.Splash-proof water quenching tank.Kana mvura yadzima, tanga wasimudza tswanda yezvikamu mutangi, mira pamusoro penzvimbo yakachinjika, vhara chivharo chetangi, wozodzikisa zvikamu zvetswanda mumvura kusvika yanyura.

Alkaline potassium permanganate pretreatment: mhinduro yekurapa ine sodium hydroxide 100→125g/L, sodium carbonate 100→125g/L, potassium permanganate 50g/L, tembiricha yemhinduro 95~105℃, nguva yekurapa 2 ~ 4 awa.Kunyangwe alkaline potassium permanganate kurapwa haina kunaka seyakanyungudutswa munyu kurapwa, zvakanakira kuti yakakodzera magungano ane welded seams kana crimping.

Kuti usunungure chiyero che oxide, iyo inotevera yakasimba asidhi inotorwa zvakananga kuti igadziriswe nenzira yekunyudza.

Kudzivirira iyo asidi kubva pakunyungudutsa simbi yepasi, nguva yekunyudza uye tembiricha yeasidhi inofanira kunyatsodzorwa.