The difference between electro-galvanized and hot-dip galvanized.

March 22, 2023

The difference between electro-galvanized and hot-dip galvanized.

1. Different concepts

Durable Iron Wire Hot-dip galvanizing, also called hot-dip galvanizing and hot-dip galvanizing, is an effective metal anti-corrosion method, mainly used in metal structure facilities in various industries. It is to immerse the rust-removed steel parts in the molten zinc at about 500 ℃, so that the surface of the steel parts will be attached with a zinc layer, so as to achieve the purpose of anti-corrosion. Electro galvanizing, also known as cold galvanizing in the industry, is the process of forming a uniform, dense and well-bonded metal or alloy deposition layer on the surface of the work piece by electrolysis. Compared with other metals, zinc is a relatively cheap and easy-to-plate metal. Durable Iron Wire is a low-value anti-corrosion coating and is widely used to protect steel parts, especially to prevent atmospheric corrosion, and for decoration.
2. The process is different
Durable Iron Wire Hot-dip galvanizing process: finished product pickling-water washing-adding auxiliary plating solution-drying-rack plating-cooling-chemical treatment-cleaning-polishing-hot-dip galvanizing completed. Electro galvanizing process: chemical degreasing - hot water washing - water washing - electrolytic degreasing - hot water washing - water washing - strong corrosion - water washing - electrogalvanized iron alloy - water washing - water washing - light emission - passivation - water washing - drying.

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3. The process is different
Durable Iron Wire are many processing techniques for hot-dip galvanizing. After the workpiece is degreasing, pickling, dipping, drying and other processes, Durable Iron Wire can be immersed in the molten zinc bath, and it can be taken out after a certain period of time. This is hot-dip galvanizing. Like some hot-dip pipe fittings are processed in this way.
Electro-galvanizing is processed by electrolytic equipment. After degreasing, pickling and other processes, it is immersed in a solution containing zinc salts, connected to electrolytic equipment, and deposits a zinc layer on the workpiece during the directional movement of the positive and negative electrodes. .
4. The appearance is different
Durable Iron Wire overall appearance of hot-dip galvanizing is slightly rougher, and Durable Iron Wire will produce process watermarks, dripping tumors, etc., especially at one end of the workpiece, which is silver-white as a whole. The surface layer of electro-galvanized is relatively smooth, mainly yellow-green, of course, there are also colorful, bluish-white, white with green light, etc. The whole workpiece basically does not appear zinc tumors, agglomerations, etc.