Hot dip galvanizing production equipment The principle and technology of electrogalvanizingElectroplating: the process of forming a uniform, dense, well-bonded metal or alloy deposit layer on the surface of a part by electrolysis. A: galvanized overview (1) compared with other metals, zinc is...Send InquiryChat Now
The principle and technology of electrogalvanizingElectroplating: the process of forming a uniform, dense, well-bonded metal or alloy deposit layer on the surface of a part by electrolysis.
A: galvanized overview
(1) compared with other metals, zinc is relatively cheap and easy a metal plating, belongs to the low corrosion electric plating, is widely used to protect steel parts, especially to prevent atmospheric corrosion, and used for decoration, plating technology including tank (or hang) plating, barrel plating plating (suitable for small parts), automatic plating and continuous plating (suitable for wire, strip).
Hot Dip Galvanizing Production Equipment At present, the electroplating solution in China can be classified into four categories:
1. Cyanide galvanizing:
as (CN) is highly toxic, the environmental protection puts forward strict restrictions on the use of cyanide in electrogalvanizing, and constantly promotes the development of the system of reducing cyanide and substituting oxide electroplating solution, requiring the use of low cyanide (micro cyanide) electroplating solution.After adopting this process, the quality of products is good, especially color plating. After passivation, the color remains good.
2. Zincate galvanizing:This process is derived from cyanide galvanization, and two major factions have been formed in China, which are: a) "DPE" series b)" DE" series of wuhan wood insurance institute.
Hot Dip Galvanizing Production Equipment Zincate galvanization, which is an alkaline additive, has a PH value of 12.5~13.Using this process, the plating lattice structure is columnar, has good corrosion resistance and is suitable for color galvanizing.Typical formula:
94 is the product code name "dpe-11" and the binding of ethanolamine.
Note: the product out of the tank - washed out after light (nitric acid and hydrochloric acid) - wash passivation - hot dry washing - washing dry aging treatment (oven within 80 ~ 80 C)."
3. Galvanizing chlorideThis process is widely used in electroplating industry, accounting for up to 40%.
After passivation (blue and white) zinc chromium can be substituted (comparable to chromium plating), especially after the addition of water-soluble varnish, it is difficult for the layman to distinguish between galvanized and chromed.
Hot Dip Galvanizing Production Equipment This process is suitable for white passivation (blue and white, silver and white). If the customer has no special requirements, it is better to choose silver passivation (the color remains stable).