Anti-rust technology of wheel spacers and wheel stud

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Anti-rust technology, the car will inevitably encounter various road conditions, especially rain, so some car owners worry about whether the rain will corrode the bolts, especially in severe weather conditions such as slight acid rain. The salt spray test is generally used as the inspection standard. This question is very important, because the anti-rust technology of products on the market be dazzled us. The following are the advantages and disadvantages of normal anti-rust technology.


Dacromet anti-rust, anti-corrosion performance The thickness of the anti-rust film is only 4-8μm, but its anti-rust effect is more than 7-10 times that of the traditional electro-galvanizing, hot-dip galvanizing or paint coating method. No hydrogen embrittlement, Dacromet's processing technology determines that it has no hydrogen embrittlement phenomenon, so Dacromet is very suitable for the coating of stressed parts. High heat resistance, Dacromet can withstand high temperature corrosion, and the heat resistance temperature can reach above 300℃. Good adhesion and recoating performance. Dacromet coating has good adhesion to the metal substrate, and has strong adhesion to other additional coatings. The processed parts are easy to spray and color. There is no pollution and pollution. Dacromet will not produce waste water and waste gas that pollute the environment during the entire process of production, processing and workpiece coating. There is no need to treat the three wastes, which reduces the treatment cost.


Chrome plating has a high level of rust prevention. Chrome plating can be distinguished by the naked eye. It is a silvery white metal with a bluish tint, so bright silver can be seen on the surface of the product. However, this technology is not environmentally friendly in the production process. Therefore, many developed countries have abandoned this technology. It cannot be denied that its anti-rust level is good, but at the same time, the drawbacks of this technology are "hydrogen embrittlement". Dacromet has overcome this drawback and its The processing process has its own bugs, which may endanger the safety of materials.


At the same time, share what is called "hydrogen embrittlement".

(Hydrogen embrittlement is the hydrogen dissolved in steel, which aggregates into hydrogen molecules, causing stress concentration, exceeding the strength limit of steel, and forming small cracks in the steel, also called white spots. Hydrogen embrittlement can only be prevented, not cured. Hydrogen embrittlement Once produced, it cannot be eliminated. In the smelting process of the material and the manufacturing and assembly of the parts, it enters the steel, and the internal residual or external stress causes the material to embrittlement or even crack.)



Electrophoresis anti-rust, the principle of electrophoresis anti-rust may be too complicated to explain, so I have summarized a few points for everyone, the electrophoretic anti-rust layer has a good anti-rust level in the state of not being damaged, but we know the process of assembly of mechanical parts Abrasion is indispensable, so the degree of abrasion will affect the anti-rust level and anti-rust time.

Galvanized anti-rust is also an anti-rust process, but the level of anti-rust is low. After spraying the anti-rust layer, the appearance is not beautiful and corrosion-resistant. Generally, we don't choose this anti-rust process when we buy bolts and nuts.


If you have any other comments, please leave a message. Thank you for your reading.

Thank u very much~

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