Electro zinc plating txheej txheem
1. Lub tswv yim ntawm electroplating zinc
Electrogalvanizing: Nws yog cov txheej txheem uas siv electrolysis los ua ib qho kev sib xws, ntom ntom, thiab zoo -cov hlau los yog cov hlau nplaum tso rau ntawm qhov chaw ua haujlwm. Piv nrog rau lwm cov hlau, zinc yog ib qho pheej yig thiab yooj yim -rau- plat hlau. Nws yog ib qho qis -tus nqi tiv thaiv-corrosion electroplating txheej thiab yog dav siv los tiv thaiv steel qhov chaw, tshwj xeeb tshaj yog tiv thaiv atmospheric corrosion, thiab kho kom zoo nkauj. Plating technologies muaj xws li tank plating (los yog khib plating), chim plating (tsim rau me me), tsis siv neeg plating thiab nruam plating (tsim rau cov xov hlau thiab strips).
2. Kev faib tawm ntawm electroplated zinc
Tam sim no, cov kev daws teeb meem hauv tsev electroplating tuaj yeem muab faib ua plaub pawg loj:
(1) Cyanide galvanizing
Txij li thaum (CN) muaj tshuaj lom heev, kev tiv thaiv ib puag ncig tau muab kev txwv nruj rau kev siv cyanide hauv electroplating zinc. Txoj kev loj hlob ntawm electroplating zinc plating cov kev daws teeb meem uas txo cov cyanide thiab hloov cyanide yog txuas mus ntxiv, yuav tsum tau siv cov tshuaj uas tsis tshua muaj cyanide (micro cyanide) electroplating solutions . .
Tom qab electroplating siv cov txheej txheem no, cov khoom zoo yog qhov zoo, tshwj xeeb tshaj yog cov xim plating, thiab xim tseem zoo tom qab passivation.
(2) Zinc plating
Cov txheej txheem no hloov zuj zus los ntawm cyanide galvanizing. Tam sim no, ob pawg loj tau tsim nyob rau hauv Suav teb, uas yog: a) "DPE" series ntawm Wuhan Materials Protection Institute; b) "DE" series ntawm xov tooj cua, Zaj duab xis thiab TV lub koom haum. Ob leeg yog zincate zinc plating nrog alkaline additives, nrog tus nqi pH ntawm 12.5 ~ 13.
Siv cov txheej txheem no, txheej txheej lattice qauv yog columnar, muaj corrosion kuj zoo, thiab yog haum rau xim galvanizing.
Note: After the product comes out of the tank -> water washing -> light extraction (nitric acid + hydrochloric acid) -> water washing -> passivation -> water washing -> water washing -> ironing and drying -> drying ->Kev laus kev kho mob (80 ~ 90℃hauv qhov cub.
(3) Chloride galvanizing
Cov txheej txheem no yog siv dav hauv kev lag luam electroplating, suav txog li 40%.
Tom qab passivation (xiav dawb), zinc tuaj yeem hloov chromium (piv rau chrome plating). Tshwj xeeb tshaj yog tom qab ntxiv dej- cov kua roj vanish, nws nyuaj rau cov neeg ua haujlwm kom paub qhov txawv seb nws puas yog zinc plating lossis chromium plating.
Cov txheej txheem no tsim nyog rau kev ua haujlwm dawb (xiav dawb, nyiaj dawb).
(4) Sulfate galvanizing
Cov txheej txheem no tsim nyog rau kev plating tas mus li (xaim, strips, yooj yim, tuab thiab loj qhov chaw thiab cov khoom), thiab tus nqi qis.
3. Hluav taws xob-galvanizingtxheej txheem
(1) Electro-galvanizing txheej txheem ntws
Noj galvanized hlau alloy ua piv txwv, cov txheej txheem ntws raws li hauv qab no:
Tshuaj degreasing → dej kub ntxuav → dej ntxuav → electrolytic degreasing → dej kub ntxuav → dej ntxuav → muaj zog corrosion → dej ntxuav → electroplating zinc - hlau alloy → dej ntxuav → dej ntxuav → lub teeb extraction → passivation → dej ntxuav → ziab.
(2) Kev npaj ntawm electrogalvanizing da dej
Kev npaj cov tshuaj plating (siv lL ua piv txwv):
a. Ua ntej ntxiv 1/3 ntim dej ntshiab rau hauv lub tank plating;
b. Dissolve sodium hydroxide nrog 1/3 dej ntshiab (nws yuav ua kom sov thaum yaj, yog li ceev faj);
c. Siv cov dej me me los ua zinc oxide rau hauv cov tshuaj txhuam hniav, tom qab ntawd ntxiv cov dej ntshiab ntxiv thiab do kom huv si. Maj mam ntxiv cov nplawm zinc oxide rau cov kua dej sodium hydroxide yaj, do thaum ntxiv, kom txog rau thaum nws yog tag nrho complexed thiab ces ntxiv rau lub plating tank;
d. Thaum qhov kub ntawm cov tshuaj plating poob qis dua 30 ~ C, ntxiv 85g ntawm Baser thiab do kom huv si;
e. Dissolve 15mL BaseF hauv 15gBaseR, thiab tom qab ntawd ntxiv cov sib tov rau hauv lub tank plating;
f. Ntxiv 4mL ntawm H-O624, do kom huv si; ntxiv dej rau qhov xav tau ntim;
g. Ntxiv brightener ZF-105A thiab ZF-105B; do kom huv si.
Dub passivation txheej txheem: dej ntxuav → lub teeb extraction → dej ntxuav → dub passivation → dej ntxuav → ncej- ua → ziab.
(3) Cov yam ntxwv cuam tshuam rau electro-galvanizing
a. Cov nyhuv ntawm zinc cov ntsiab lus
Yog tias cov ntsiab lus zinc siab dhau lawm, qhov ci ntsa iab yog nqaim, thiab cov txheej tuab yog yooj yim kom tau, thiab cov ntsiab lus hlau hauv txheej yog txo; Yog tias cov ntsiab lus zinc tsawg dhau, qhov ci ntsa iab yog qhov dav, nws yuav siv sijhawm ntev kom ncav cuag qhov xav tau tuab, thiab cov ntsiab lus hlau hauv txheej yog siab.
b. Cov nyhuv ntawm sodium hydroxide
Thaum cov ntsiab lus sodium hydroxide siab dhau lawm, nws yooj yim rau hlawv thaum lub sijhawm ua haujlwm kub -; Thaum cov ntsiab lus sodium hydroxide tsawg dhau, lub peev xwm dispersion tsis zoo.
c. Cov nyhuv ntawm cov ntsiab lus hlau
Yog tias cov ntsiab lus hlau siab dhau lawm, cov ntsiab lus hlau hauv txheej yuav siab, thiab cov yeeb yaj kiab passivation yuav tsis ci; Yog tias cov ntsiab lus hlau tsawg dhau lawm, cov ntsiab lus hlau hauv txheej yuav qis, qhov kev tiv thaiv corrosion yuav raug txo, thiab cov xim yuav yog txiv ntseej -xim av.
d.Qhov cuam tshuam ntawm brightener
Yog tias ZF-IOOA siab dhau lawm, cov txheej yuav nkig; yog tias nws qis dhau, yuav tsis muaj txheej txheej hauv qhov chaw qis tam sim no thiab cov xim passivation yuav tsis sib npaug; Yog tias ZF-100B siab dhau lawm, cov txheej yuav nkig; yog tias nws qis dhau, tag nrho cov txheej yuav tsis ci.
e. Cov nyhuv ntawm qhov kub thiab txias
Yog tias qhov kub thiab txias dhau lawm, lub peev xwm dispersion raug txo, cov ntsiab lus hlau nyob rau hauv txheej yog siab, corrosion kuj yog txo, thiab cov xim ntawm passivation zaj duab xis yog tsis sib xws thiab tawg; Qhov kub thiab txias yog qhov tsawg dhau, qhov chaw siab tam sim no raug kub hnyiab, cov txheej yog nkig, thiab tus nqi deposition qeeb.
f. Cov nyhuv ntawm cathode txav
Cathode txav yuav tsum tau siv. Yog tias qhov txav ceev dhau, cov txheej hauv qhov chaw siab tam sim no yuav ntxhib; yog tias nws txav qeeb dhau, huab cua ntws tuaj yeem tshwm sim thiab yuav tsis muaj txheej txheej hauv zos.