Insoluble Titanium Anodes For Galvanizing Steel Sheets

In the high-speed electro-galvanizing process, the selection and preparation of anode materials is a very important issue. The structural form, lifespan and quality of the galvanized steel sheet of the plating tank largely depend on the anode. There are two types of anodes used in electrogalvanizing, namely soluble anodes and insoluble anodes. Insoluble anodes have been widely used in the modern galvanizing industry due to their advantages of improving the uniformity of the coating, reducing energy consumption, and ensuring the operation rate and production continuity without frequent replacement. In general, insoluble anodes need to meet the following basic requirements:
(1) Has good electrical conductivity;
(2) Strong corrosion resistance;
(3) Good mechanical strength and processing performance;
(4) Long life and low cost.
With the development of modern electro-galvanizing industry, people have conducted extensive research on insoluble anodes for electro-galvanizing, and have been gradually popularized and applied to electro-galvanizing production.

Reaction Mechanism of Titanium Anode for Steel Galvanizing:

Anodic reaction (on the anode surface):
2H2O→+O2↑+4H++4e
Main cathodic reactions (on the surface of the steel plate):
Zn2+ + 2e→Zn/ Sn2+ + 2e→Sn
Cathodic surface reaction:
2H2O+ 4e- + H2↑+ 2OH-

 

1. Steel plate galvanized, titanium anode for galvanized
(1) Galvanized sheet
Electro-galvanized sheet has good corrosion resistance, processability, weldability and paintability, and is mainly used in industries such as automobiles, home appliances, and light industry. Electro-galvanized products have double-sided and single-sided according to different coatings.
And different thickness plating and other varieties. At the same time, according to the different post-plating treatments, there are passivation, phosphating, anti-fingerprint and other products.
(2) Electroplated tin plate
Electroplated tin plate is mainly used in the packaging industry, it has excellent corrosion resistance, beautiful appearance, high strength, light weight, good formability, and good resistance to organic substances, dilute acids, alkalis
and salt attack performance. Tinplate products can be further subdivided into two categories: food (that is, food packaging products) and general-purpose products (that is, non-food packaging products).
2. Brief description of production process
After several pretreatment processes, the anodized strip passes through a series of electrolytic cells. The electrolyte in these electrolyzers contains soluble zinc or tin ions, and after electrochemical reaction, they will be electrolytically deposited on the strip surface.

In recent years, China's high-end application of electrogalvanized steel sheet and food application of electrotin plate market is growing rapidly. Several new steel sheet electrogalvanizing/tinning lines are either in the construction stage, or in the engineering planning and design stage. In order to reduce production downtime , to ensure a high-quality and uniformly distributed zinc/tin coating in the width direction of the steel plate, the use of high-quality and long-life iridium mixed metal oxide (MM0) coated inert titanium anodes is becoming more and more important.

 JM-TITANIUM is located in Baoji City, Shaanxi Province. It is a research and development, production and sales company integrating electrocatalytic titanium electrode materials, electrochemical electrolytic cells and accessories, electrolytic sodium hypochlorite devices and accessories, non-ferrous metal materials and their deep-processing products. enterprise. The electrocatalytic electrode products developed and produced by the company include: ruthenium-iridium coated titanium anode, iridium-tantalum-coated titanium anode plate, titanium platinum-plated anode, titanium ruthenium-coated anode plate, sodium hypochlorite electrolytic cell and other electrocatalytic electrodes and electrolytic cells.

 

 

Selection of anode material for galvanized and tinned steel plate
In the process of electro-galvanizing and electro-tin plating, there are two types of anode materials: one is soluble anodes, zinc anodes, lead and lead alloy anodes are mostly used in traditional galvanizing and tin plating, but soluble anodes are used in the production process There are more and more disadvantages, so in recent years, more and more insoluble anodes are used in galvanizing and tin plating.
In the cooperation with customers, we constantly adjust the anode coating formula. After process improvement and repeated testing, we have developed several oxide anodes suitable for different production requirements. The coating is evenly distributed, has high electrocatalytic activity, and is durable. Strong corrosion, long service life, high stability, no secondary pollution, no anode mud generation, keep the plating solution clean, reduce apparent blackening or black spots and other problems.

 

 

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