Electroless dub nickel plating tov rau hluav taws xob cua sov raj

Electroless dub nickel plating tov rau hluav taws xob cua sov raj

Cov tshuaj dub npib tsib xee plating ua hauj lwm tov yog npaj nrog HH118-5 chemical dub npib tsib xee plating additive, thiab cov tshuaj plating yog cov kua ntsuab pob tshab. Thaum cov tshuaj plating raug kho rau nws lub xeev ua haujlwm nrog tus nqi pH ntawm 9-10, nws yog cov kua pob tshab xiav. Tus nqi sedimentation yog 5-8 µ m/h. Cov txheej txheem siv yog raws li nram no:

1, txheej txheem khiav

1. HH922A degreasing → dej ntxuav → HH942 xeb tshem tawm ua kom → dej ntxuav → dej ntxuav → dej kub preheating → tshuaj npib tsib xee phosphorus alloy plating → dej ntxuav → tshuaj dub nickel plating → dej ntxuav → HH118-7 dej passivation ntxuav → tom qab kho

2. HH922A degreasing → dej ntxuav → HH942 xeb tshem tawm ua kom → dej ntxuav → dej ntxuav → dej kub preheating → tshuaj dub nickel plating → dej ntxuav → dub passivation (HH118-7) → dej ntxuav → tom qab kho

Nqe lus piav qhia: ① txheej txheem ntws 1, haum rau plated qhov chaw ua los ntawm cov hlau, tooj liab alloy, aluminium alloy, cam khwb cia hlau thiab lwm yam ntaub ntawv, xws li siab hardness thiab phom dub xim.

② Cov txheej txheem ntws 2 yog tsim rau ncaj qha plating ntawm dub npib tsib xee ntawm hlau, txhuas alloy, cam khwb cia hlau, thiab tooj liab alloy, nrog rau ncaj qha plating ntawm stainless hlau, npib tsib xee plating, thiab chromium plating.

③ Thaum ncaj qha plating dub npib tsib xee rau stainless hlau, npib tsib xee plated qhov chaw, thiab lwm yam., ua kom muaj kev kho mob nrog concentrated hydrochloric acid los yog 20 feem pua ​​sulfuric acid (30-45 degree) yuav tsum tau ua ntej plating, thiab lub sij hawm yuav tsum tsis txhob tsawg tshaj li 10. feeb. Thaum plating aluminium alloy qhov chaw, nws yuav tsum tau ua raws li cov txheej txheem aluminium alloy. (Dub npib tsib xee plating ntawm aluminium alloy nrog cais phau ntawv qhia)

2, Kev npaj cov kua dej ua haujlwm

1. Npaj cov kua dej ua haujlwm raws li cov qauv hauv qab no

Nickel sulfate: 25 g / l

Sodium hypophosphite: 25 g / l

HH118-5: 200ml/L (kwv yees 220g/L)

2. Muab xam ib nrab ntawm tag nrho cov dej nyob rau hauv cov kev daws teeb meem, dissolve npib tsib xee sulfate thiab sodium hypophosphite cais, sib tov thiab precipitate, ntxiv HH118-5 thiab do tusyees. Ntxiv dej rau qhov yuav tsum tau ntim ntawm cov tshuaj ua hauj lwm, thiab ces do thiab precipitate los yog lim kom huv si kom tau txais cov kev daws teeb meem.

3. Kho tus nqi pH rau 10-11 nrog dej ammonia (tso pH tus nqi nyob rau hauv thaj tsam ntawm 9-10 thaum ua haujlwm).

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ir sib. Ntxiv dej rau qhov yuav tsum tau ntim ntawm cov tshuaj ua hauj lwm, thiab ces do thiab precipitate los yog lim kom huv si kom tau txais cov kev daws teeb meem.

3. Kho tus nqi pH rau 10-11 nrog dej ammonia (tso pH tus nqi nyob rau hauv thaj tsam ntawm 9-10 thaum ua haujlwm).

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