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Steel plate electroplating

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Application field and principle introduction

Nowadays, because of the high and lagging market price of zinc and the quality of HDG coated steel plate, some new zinc plating production lines are either in the process of construction, or have decided to build, or are in the stage of completion. At the same time, the demand of packaging market in line with food standards has also increased, which requires that the tin plating line must conform to a clear, food grade production process. In addition, the development of electroplating tin line to reduce the formation of tin slime requires that all production lines should be installed with insoluble anode, rather than only used as auxiliary anode. Therefore, in order to fully ensure the uniformity of current distribution within the service life, the application of insoluble anode with clear, predictable and long life is becoming more and more important in the field of galvanizing and tin plating.

Typical application conditions and product recommendation

Through long-term research and development, our company has accumulated practical experience in producing high-quality anode products required for electroplating steel plate under harsh working conditions. Our company works closely with our customers to design and manufacture anode products suitable for various steel plate electroplating, including: typical process conditions of continuous steel plate galvanizing & ndash; EGL, typical process conditions of continuous steel plate tinning 报错– ETL ……

 

Type of electroplating solution for galvanizing (TIN) of strip steel

 

application

EGL electrogalvanizing

ETL tin plating

Electrolytetype

Zn

Zn-Ni

PSA

MSA

temperature/℃

45~70

45~60

50~60

40~65

Ph

<1

<1

 

 

sulfuric acidg/l

10~100

10~50

40~70

<10

Methyl sulfonic acid g/l

 

 

 

30~60

Phenol sulfonic acids /l

 

 

15~60

 

Sn²(g/l)

 

 

27~29

 

ZnasZnSO4(g/l)

60~125

30~60

 

 

NaasNa2SO4

0~100

 

 

 

NiasNi2SO4(g/l)

 

40~60

 

 

Fe/(g/l)

<10

<10

<10

<10

chlorideug/g

<50

<50

 

 

luorideug/g

<2

<2

 

 

organicadditive

 

 

 

 

ENSA/(g/l)

 

 

2.5~3.5

 

EN/(g/l)

 

 

4.5~5.5

 

Crystal scouring agent /ml

 

 

 

40~60

antioxidantml/l

 

 

 

15~25

currentdensityA/m2

5k~15k

5k~12k

2k~4k

2k~7k

Anode type

Customized iridium oxide mixed coating anode

Customized iridium oxide mixed coating anode