Qhov sib txawv ntawm phosphating thiab cov kev kho mob hla dhau ntawm cov hlau nyob hauv lawv lub hom phiaj thiab kev siv tshuab.

Phosphatating yog ib txoj kev tseem ceeb rau kev tiv thaiv corrosion hauv cov ntaub ntawv hlau. Nws lub hom phiaj suav nrog muab kev tiv thaiv corrosion, pab raws li qhov primer ua ntej txheej txheej, thiab ua yeeb yam raws li cov roj nplua nyeem hauv hlau ua hlau. Phosphating tuaj yeem raug faib ua peb hom raws nws cov ntawv thov: 1) Muab cov khoom siv hluav taws xob: 2) txias ntxiv rau lub ntsej muag, thiab 3) zoo nkauj phosphatating. Nws kuj tseem tuaj yeem muab faib ua ke, xws li zinc phosphate, iron posphate, iron posphate, zinc-manganese phosphate, thiab manganese phosphate. Ib qho ntxiv, phosphating tuaj yeem raug faib los ntawm qhov kub: Kev kub siab (siab dua) phospect, nyob ib ncig ntawm 40 ℃) phosphating, thiab chav-kub (10-30 ℃) phosphating.

Ntawm qhov tod tes, yuav ua li cas hla kev tshwm sim hauv cov hlau, thiab nws lub tshuab yog dab tsi? Nws yog ib qho tseem ceeb kom nco ntsoov tias passivation yog qhov tshwm sim los ntawm kev sib cuam tshuam ntawm cov hlau theem thiab kev daws teeb meem lossis los ntawm interfacial tshwm sim. Kev tshawb fawb tau pom cov kev cuam tshuam ntawm kev puas ntawm kev ua haujlwm ntawm kev puas tsuaj ntawm cov hlau hauv lub xeev passivated. Qhov kev sim qhia tau tias kev ua txhaum ntawm cov hlau saum npoo hlau ua rau muaj kev hloov tsis zoo hauv cov hlau muaj peev xwm, ua kom cov hlau hauv lub xeev passivated. Qhov no qhia tau tias passive yog ib qho kev cuam tshuam interfacial tshwm sim thaum cov hlau tuaj nkag mus rau qee qhov nruab nrab. Electrochemical passivation tshwm sim thaum lub sij hawm anodic polarization, ua rau cov hlau oxides lossis cov khoom siv ntawm cov khoom siv hluav taws xob, tsim zaj duab xis passive thiab ua rau cov hlau passivation. Tshuaj lom neeg passivation, ntawm qhov tod tes, koom nrog kev ua yeeb yaj kiab oxidrated xws li yooj yim beivatable metrals xws li CR thiab NI. Hauv kev lom zem ua haujlwm, cov concentration ntawm cov oxidizing tus neeg sawv cev yuav tsum tsis txhob poob qis dua ib tus nqi tseem ceeb; Txwv tsis pub, nws yuav tsis ntxias passivation thiab tuaj yeem ua rau kom ceev dua hlau dua li.