Dacromet and hot-dip galvanizing are both commonly used electroplating methods, so what is the difference between them? Let the editor learn about it with you today.
1. Different ingredients:
Dacromet mainly contains zinc powder, aluminum powder, chromic acid and deionized water;
Hot-dip galvanizing is immersing metals such as steel, stainless steel, and cast iron into molten liquid metal or alloys.
2. The principles are different:
Dacromet is due to the overlapping layers of flake zinc and aluminum, which hinders the process of corrosive media such as water and oxygen reaching the substrate, and can act as an isolated shielding effect;
Hot-dip galvanizing is a method of immersing steel components in molten zinc to obtain a metal coating.
3. Different applications:
Hot-dip galvanizing is mainly widely used in power towers, communication towers, railways, highway protection, street light poles, substation ancillary facilities, light industry, etc.;
Dacromet is mainly used for the anti-corrosion of various elastic parts on trucks and the anti-corrosion of metal parts in high-heat environments such as around engines.
4. In terms of salt spray time, Dacromet's salt spray resistance test time is relatively long, but the test is in a neutral environment; in terms of outdoor atmospheric environment, hot-dip galvanizing has better anti-corrosion ability.
In addition, the hot-dip galvanized coating is thick and rough in appearance, but has good adhesion and the surface treatment can resist high temperatures;
Dacromet has a thin coating and a bright appearance, but the surface treatment cannot withstand high temperatures.
Hot-dip galvanizing, also called hot-dip galvanizing and hot-dip galvanizing: is an effective method of metal anti-corrosion and is mainly used for metal structural facilities in various industries. It is to immerse the rust-removed steel parts into molten zinc liquid at about 500°C, so that the zinc layer is attached to the surface of the steel components, thereby achieving the purpose of anti-corrosion.
The process flow of hot-dip galvanizing: pickling of finished products - water washing - adding plating solution - drying - rack plating - cooling - chemical treatment - cleaning - polishing - hot-dip galvanizing is completed.
Hot-dip galvanizing was developed from the older hot-dip method. Since France applied hot-dip galvanizing to industry in 1836, it has a history of more than 170 years.
Dacromet is the transliteration and abbreviation of DACROMET, abbreviated as Dacromet, Dacromet, and Dickron. Domestically named chrome coating, it is a new type of anti-corrosion coating whose main components are zinc powder, aluminum powder, chromic acid and deionized water.
Dacromet process flow: organic solvent degreasing--mechanical polishing--spraying--baking--secondary spraying--baking--drying
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