12.9 grey phosphated tsheb log ntsia liaj qhov rooj

Cov txheej txheem thev naus laus zis ntawm qhov chaw fasteners xws li U-bolts feem ntau yog txias galvanized, uas tuaj yeem ua rau cov cim ntawm xeb tom qab siv ntau tshaj 1 xyoos. Thaum rusted, nws yuav tsis tsuas yog cuam tshuam rau cov tsos thiab tsos, tab sis kuj cuam tshuam rau nws cov kev ua tau zoo muaj kev cuam tshuam zoo rau kev siv cov khoom siv, yog li hauv peb txoj kev siv, peb yuav tsum xyuam xim rau cov xwm txheej hauv qab no los tiv thaiv xeb.
Ua ntej, cia qhov chaw ntawm U-bolt qhuav kom ntau li ntau tau kom peb thiaj li zam tau nws ntau.
1. Kev sib txuas ntawm cov plua plav lossis lwm cov khoom siv hlau, hauv cov huab cua ntub, cov dej sib txuas thiab cov hlau tsis huv, txuas ob lub roj teeb rau hauv micro-roj teeb, ua rau muaj kev cuam tshuam ntawm electrochemical kev coj cwj pwm, thiab cov yeeb yaj kiab tiv thaiv tau yooj yim puas tsuaj, uas yog hu ua electrochemical Analyze corrosion..
2. Stainless hlau U-bolt muaj adhesion rau saum npoo ntawm cov kua txiv hmab txiv ntoo, thaum tsis muaj dej thiab oxygen los tsim cov organic acid, cov organic acid yog ib tug ntev corrosion nyob rau saum npoo ntawm cov khoom hlau.
3. Cov adhesion ntawm stainless hlau U-bolts, alkali thiab ntsev nplua nuj nto ua rau lub zos corrosion ntawm cov tub ntxhais kawm.
4. Nyob rau hauv tej huab cua phem (xws li cov huab cua yog nplua nuj nyob rau hauv ib tug loj tus naj npawb ntawm sulfides sib txawv, carbon oxides, nitrogen oxides nyob rau hauv kuv lub teb chaws), uncondensed dej tsim cov kua point ntawm sulfuric acid, nitric acid, thiab acetic acid, ua rau cov me nyuam kawm ntawv. rau chemistry structural corrosion.