Thermal Spraying Coating Classification

       

According to the classification method of
thermal spraying coating by F.N.LONGO in the United States, the coating can be
divided into:

1. Wear resistant coating

It includes anti adhesion wear, surface
fatigue wear coating and erosion resistant coating. In some cases, there are
wear resistant coatings against low temperature (< 538 ℃) and high
temperature (538 ~ 843 ℃).

2. Heat resistant and oxidation resistant
coating

The coating includes coatings applied in
high temperature process (including oxidation atmosphere, corrosive gas,
erosion above 843 ℃ and thermal barrier) and molten metal process (including
molten zinc, molten aluminum, molten iron and steel, molten copper).

3. Atmospheric and immersion corrosion
resistant coatings

Atmospheric corrosion includes corrosion
caused by industrial atmosphere, Salt atmosphere and field atmosphere;
Immersion corrosion includes corrosion caused by drinking fresh water, non
drinking fresh water, hot fresh water, salt water, chemistry and food
processing.

4. Conductive and resistive coatings

The coating is used for conductivity,
resistance and shielding.

5. Restore size coating

The coating is used for iron-based
(machinable and grindable carbon steel and corrosion-resistant steel) and
non-ferrous metal (nickel, cobalt, copper, aluminum, titanium and their alloys)
products.

6. Gap control coating for mechanical
components

The coating is grindable.

7. Chemical resistant coating

Chemical corrosion includes the corrosion
of various acids, alkalis, salts, various inorganic substances and various
organic chemical media.

Among the above coating functions,
wear-resistant coating, heat-resistant anti-oxidation coating and chemical
corrosion-resistant coating are closely related to the production of
metallurgical industry.

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