Dacromet technology - the epoch-making process of metal surface treatment
Dacromet is the transliteration and abbreviation of DACROMET (brand name), referred to as Dacromet, Dakrust, Dickon. The domestic name is zinc chromium coating, which is a new type of anticorrosive coating with zinc powder, aluminum powder, chromic acid and deionized water as the main components.
Dacromet (also known as Dak rust, zinc-chromium film, Dakman, etc.), which is a zinc-based zinc-based salt micro-coating metal anti-corrosion coating, is a high-tech surface treatment in the world today, and is praised as an international by experts. A revolutionary product of epoch-making significance in the surface treatment industry. Steel Dakman technology is currently a blank in China.
Dacromet coatings have a variety of properties. Such as strong corrosion resistance: 7-10 times higher than electroplating zinc; no hydrogen embrittlement: especially suitable for high-strength parts; high heat resistance: heat-resistant temperature 300 °C. Particularly suitable for high-strength components of motorcycle engine components. In addition, it also has the advantages of high permeability, high adhesion, high friction reduction, high weather resistance, high chemical stability and no environmental pollution.
Base material range for Dacromet technology: steel products and non-ferrous metals such as aluminum, magnesium and their alloys, copper, nickel, zinc, etc. and their alloys.
Dacromet technology can replace a variety of surface protection processes such as electroplating, cadmium plating, hot dip galvanizing, hot blasting, mechanical galvanizing, zinc-based alloy plating, oxidation, phosphating. Excellent prevention of environmental pollution.
Non-chromium-zinc-aluminum coatings currently have a handful of industrialized products, such as the Geomet coating from MCI, the Delta coating from Delta, Germany, and other brands. There are also water-based chromium-free zinc-aluminum coatings in China. At present, the main markets of Geomet are the United States and Japan; the main markets of Delta are Europe and some Asian countries; the main markets of BNC are Western Europe and Taiwan. The three coatings account for more than 95% of the world's chromium-free Dacromet market share.
Dacromet's metal surface treatment method was first born in the 1950s. In the cold winters of North America and Northern Europe, due to snow, the thick ice layer formed on the road seriously hindered the driving of the motor vehicle. People use the method of salting on the ground to lower the temperature of the freezing point of water, dissolve the ice layer, and alleviate the problem of smooth roads. However, the chloride ions in the salt have seriously eroded the steel body, resulting in a large number of vehicles being damaged. To destruction. Therefore, how to protect driving tools such as cars, which are made at a high cost, has become a serious problem faced by manufacturers.
In order to solve this problem, DiamondShamrock developed the Jinkeluo metal with excellent salt resistance, and then developed a thin film Dacromet coating for metal parts. In 1973, the company established Nippon.Darro.shamrock (NDS) in joint venture with Japan Oil & Fats Co., Ltd., and established DACKAL in Europe and France in 1976. They divided the world market into Asia Pacific, Europe, Africa and America. The market is responsible for one region and seeks common interests on a global scale.
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