Whether mechanical parts or metal components, the most prominent problem is the surface wear or corrosion or both. Here is a brief introduction to the coating application guide:

1, wear-resistant - thermal spray technology in the high temperature and low temperature of the largest applications. This type of coating is divided into the following categories:

(1) Resistant to wear or scratch - the two surfaces are relatively slippery, and debris from one surface to the other surface, the occurrence of adhesive wear or scratches. The typical coating is cobalt-based tungsten carbide, nickel-chromium / chromium carbide coating.

(2) Wearable abrasion - abrasive wear occurs when the hard surface slides on a soft surface and wears between the two surfaces. When the fibers and threads in the surface through the high-speed, also occurred abrasive wear. The proprietary typical coating is cobalt-based Ni-Cr alloy, self-fluxing alloy mixed molybdenum, chromium oxide coating.

(3) resistance to micro-vibration wear - repeated loading and unloading cycle stress caused by surface cracking and large area off. A typical typical coating is an alumina / titania coating.

(4) cavitation-resistant wear - liquid flow produces mechanical shock on the surface. The typical coating is an aluminum bronze coating.

(5) erosion resistance wear - gas or liquid carrying particles at high speed impact surface, the occurrence of erosion wear. Typical typical coating for the alumina / titanium dioxide, alumina coating.

2, high temperature oxidation resistance - such coatings resistant to chemical or physical decomposition, improve the high temperature properties of parts. This type of coating is divided into the following:

(1) Thermal barrier coating - acts as a thermal barrier between parts and high temperature environments. The typical coating is a zirconia coating that is stabilized with yttria.

(2) anti-high temperature oxidation coating - protective matrix for high temperature oxidation. The typical coating is a nickel / chromium coating.

(3) Heat-resistant corrosion coating - Protects the substrate exposed to hot corrosive gases. The typical coating is a nickel / chromium coating.

3, anti-corrosion coating - choose this type of coating is more complex, because the parts in the service state, ambient temperature and a variety of media coating materials have certain requirements, the general use of cobalt-based alloys, nickel-based alloys and oxides Ceramics and other as a coating material, by improving the coating of the compactness, blocking the penetration of corrosive media; reasonable choice of coating materials and parts of the substrate oxidation / reduction potential to prevent electrochemical corrosion, corrosion inhibition of corrosion sealant The

4, conductive coating or insulation coating - this type of coating is divided into the following:

(1) conductive coating - special coating for the copper coating.

(2) insulation coating - special coating for the alumina coating.

(3) shielding coating - anti-electromagnetic interference (EMI) or high frequency interference (RFI) special coating for the copper coating.

5, restore the size of the coating - this type of coating is mainly used to repair due to wear or processing of ultra-poor parts. The choice of coating material depends on the use of parts requirements.