Kev siv thiab cov yam ntxwv ntawm peb tiam Trivalent Chromium Passivation rau hluav taws xob cua sov Tube Electroplating

Kev siv thiab cov yam ntxwv ntawm peb tiam Trivalent Chromium Passivation rau hluav taws xob cua sov Tube Electroplating

Daim Ntawv Thov Ntau Lawm Thib Peb Trivalent Chromium Passivation

4.1 Kev siv thiab cov yam ntxwv ntawm peb tiam trivalent chromium passivation:

Los ntawm lub rooj, nws tuaj yeem pom tias qhov kev tiv thaiv corrosion ntawm trivalent chromium passivation nce mus txog lossis txawm tias ntau tshaj ntawm cov txheej txheem hexavalent chromium.

Cov yam ntxwv tseem ceeb ntawm cov txheej txheem passivation qhib (ml / L) kev ua haujlwm thiab cov txheej txheem

261 trivalent chromium xiav dawb passivation 50-120PH: 1.5-2. xiav. 2. Tsis muaj xeb dawb thaum lub sij hawm nruab nrab ntsev tshuaj tsuag rau 96-120H.

251 Trivalent chromium multicolored passivation 90-140PH: 1.8-2. 2. Tsis muaj xeb dawb thaum lub sij hawm nruab nrab ntsev tshuaj tsuag rau 200-300H.

252 trivalent chromium tsib xim passivation 80-120PH: 1.8-2. liab. 2. Tsis muaj xeb dawb thaum lub sij hawm nruab nrab ntsev tshuaj tsuag rau 200-300H.

271 trivalent chromium dub passivation 271A: 150-250271B: 30-50PH: 1.6-2.3 Kub: 40-60 degree Lub sij hawm: 30-90 vib nas this

1. Cov txheej zaj duab xis yog xim dub thiab tsis sib xws.

2. Nyiaj dawb.

3. Tsis muaj xeb dawb thaum lub sijhawm 120-200H nruab nrab ntsev tsuag tshuaj tsuag.

4.2 Kev tswj xyuas kev tsim khoom thiab kev saib xyuas

4.2.1 pH tswj:

Tus nqi pH yog tswj los ntawm 1.6 thiab 2.5, thiab qhov zoo tshaj plaws tus nqi sib txawv rau cov txheej txheem passivation sib txawv. Tus nqi pH ntawm trivalent chromium passivation tov yog feem ntau siab dua li ntawm hexavalent chromium. Kev tswj pH ntawm trivalent chromium passivation kua yog nruj dua li ntawm hexavalent chromium. Yog hais tias tus nqi pH tsawg dhau, cov zaj duab xis txheej yog nyias thiab nquag tawg. Yog tias tus nqi pH siab dhau lawm, qhov tsim ceev ntawm txheej zaj duab xis yog qeeb thiab nquag ua rau fogging. Thaum lub sij hawm tsim khoom, tus nqi pH feem ntau nce tau. Cov kev daws teeb meem sib txawv tau hloov kho siv cov kua qaub sib txawv. Txoj kev no muaj teeb meem ntau dua hauv kev ua haujlwm los ntsuas pH tus nqi, vim tias cov tshuaj passivation muaj xim tsaus thiab nws nyuaj rau ntsuas pH tus nqi ntawm daim ntawv pH. Cov tshuaj ntxiv ntawm cov tshuaj passivation twb muaj acidity. Ntev npaum li qhov kev daws teeb meem zoo dua qub, cov kua qaub tuaj yeem rov qab mus rau qhov sib npaug, thiab tus nqi pH tsis hloov ntau, yog li tsis tas yuav hloov kho ntau zaus.

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