1.How li cas los tswj substrate zoo los ntawm qhov chaw?
Substrate Dequliness: Thaum tuaj txog, substrates yog cov roj uas tsis muaj xeb), khawb (suav nrog me, ntsuas, thiab lwm yam tsis meej. Oily substrates yog qhov nyuaj rau tshem tawm thaum ua ntej - galvanizing degreasing, uas tuaj yeem ua rau muaj kev sib tw tsis zoo. Tseb yuav tawm hauv cov pits tom qab pickling, ua rau tsis ncaj zinc txheej nplaum adhesion.
SUBTRATE tshuaj stability: cov silicon (SI tsawg dua lossis sib npaug ntawm cov ntsiab lus silvanizing (PER) Missed plating). Cov ntsiab lus phosphorus ntau dhau tuaj yeem nce substrate brittleness thiab yooj yim nrib pleb qhov zinc txheej zinc txheej thaum ua tiav.
Substrate duab raug qhov tseeb: Xyuas kom cov nthwv dej yog cov yeeb yaj kiab los yog warpos. Tus qauv tsis zoo tuaj yeem yooj yim los ntawm cov ntaub ntawv sib txhuam nrog cov kev kub ntxhov, lossis tsis sib luag ntawm cov tuab tuab (hauv zos dhau los yog tuab heev).
2.Yog li cas kom tshem impurities los ntawm substrate nto?
Degreasing: ua kom huv cov roj tsis huv los tiv thaiv cov plating plating.
Txheej Txheem Kev Ua Haujlwm Txhim Kho: Siv ib tus neeg sawv cev alkaline degreasing (xws li sorium hydroxide + surfactant), thiab kho kom haum rau cov roj paug). Kev sib xyaw ua ke ntawm txau thiab immersion tuaj yeem txhim kho qhov ua tau zoo. Yog tias cov roj paug tsis hnyav, ua ntej kho nws nrog so lub cev.
Tshaj tawm -}} degreit, yaug, tsis muaj cov tshuaj tiv thaiv dej sov (40} tuaj yeem ua rau tsis sib xws thaum lub sij hawm tom ntej). Tom qab yaug, khij cov pH tus nqi ntawm cov nplaim qaum (6-7, nruab nrab). Pickling: precisely tshem tawm cov nplai thiab txwv tsis pub dhau- / hauv qab-pickling.
Acid tswj: Siv 15 {-}}}} Ntxiv 0.1-0.3% corrosion inhibitor (xws li hexamine) kom txo cov acid corrosion ntawm substrate (zam "pitting").
Kev txiav txim siab tas los: Kev kuaj pom kev pom zoo (ntu kev tswj hwm) los tiv thaiv zinc los ntawm adating) thiab "Tshaj {{5 5}} pickling" (micro-pitting ntawm lub substrate nto, ua rau cov txheej zinc me ntsis tom qab galvanizing).
3.How kom tiv thaiv zinc txheej los ntawm kev ntxhib thiab zinc hais?
Zinc kua kua zog: Kev tswj cov khoom siv hauv cov kua zinc (hlau tsawg dua lossis sib npaug lossis ntau dua lossis sib npaug lossis sib npaug rau 0.01%). Cov ntaub ntawv hlau ntau dhau yuav ua fe - zn alloy slag (cov khoom siv "zinc nti." Nquag tshem tawm slag los ntawm cov zinc ua kua rau saum toj nrog cov nplais me ntsis (ib zaug txhua ob teev), lossis ntxiv cov xaim kua muag (xws li cov xaim txhuas) kom nqus tau impurities.
Kev tswj qhov kub thiab txias: Cov kua kub uas siv tau Kev kub dhau heev yuav ua rau cov coarse zinc txheej (ntxhib saum npoo) thiab nce zinc tau. Kev kub dhau heev yuav ua rau cov kua tsis zoo thiab tsis sib xws (tuab ntawm cov npoo thiab nyias nyob hauv nruab nrab). Lub sijhawm tiag tiag tswj yog yuav tsum siv cov khoom siv cua kub (xws li induction cua sov).
4.How ua kom ntseeg tau cov txheej zinc zinc thiab txoj kev sib raug zoo?
Matching zinc immersion time and speed: Adjust the speed according to the strip thickness (usually 10-30 m/min). For thin gauges (≤1 mm), the speed can be slightly faster to prevent the zinc coating from becoming too thick, while for thick gauges (>1 hli), qhov nrawm tuaj yeem yog qeeb me ntsis kom ntseeg tau tias txaus zeem muag txaus. Khaws lub sijhawm zinc rechersion nyob rau hauv 3-5 vib nas this. Lub sijhawm ntev dua tuaj yeem ua rau tuab thiab ntxhib zinc txheej, thaum lub sijhawm luv luv tuaj yeem ua rau tsis txaus tshwj xeeb.
Lub kaum sab xis ntawm cov kab txaij nkag mus rau qhov zinc da dej: tswj hwm 15-30℃kaum sab xis nruab nrab ntawm sawb thiab cov zinc da dej. Zam kev nkag mus ntsug (uas tuaj yeem nkag tau yooj yim itrap cua npuas thiab ua rau muaj kev sib tw hauv cov txheej zinc
5.Txhua qhov khawb thiab tsis sib luag zinc txheej?
Lub tog cov menyuam / stabilizes tu: nquag tawm cov chaw ntawm lub tog raj kheej thiab hnav (zinc ya ci ntsa iab hauv lub vias sab nraud, thaum nws hnav cov pob zeb yooj yim dua li sawb). Yog tias zinc sticking yog tam sim no, ntxuav nws kom sai li nrog cov cuab yeej tshwj xeeb kom tsis txhob ua rau puas tsuaj rau cov chais.
Cua Riam Ntsuas Kev Ua Haujlwm Zoo: Tom qab Galvanizing: Tom qab Galvanizing, ib rab riam (siab {} lub siab huab cua) yog siv los txhawm rau cov kua dawb tshaj plaws. Tswj cov riam rab zog (0.2-0.4 MPA) thiab qhov deb (10-20 hli los ntawm sawb). Ntau dhau siab ua tau kom muaj peev xwm ua rau cov zos thinner Cov cua riam nozzle yuav tsum tau nthuav dav (tshem tawm ib zaug ib lub lim tiam) los tiv thaiv clogging thiab tsis sib thooj zinc txheej tuab.