Construction preparation conditions for water-based high-temperature coatings

Substrate painting water-based high temperature coating substrate also to achieve polishing, increase the adhesion of the coating. When the roughness value of the substrate is greater than or equal to the thickness value of the coating, it is easy to lead to uneven paint film, premature pitting of peaks, and the retention of bubbles at the bottom of the valley. Such as the construction of high temperature anti-corrosion coating requires water conservation and drying, in the case of roughness is greater than the thickness of the film, the possibility of corrosion magnified
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. This example also shows that the rough surface is not suitable for thin paint film. In the spraying process design and quality planning, each link of the inspection, experimental program should be clear and detailed.
water-based high-temperature coating substrate polishing is self-test, inspection when the light is sufficient. The roughness detection method of substrate roughness control plate ISO8503, needle measuring instrument, imprinting tape method. Roughness model has blast roughness comparison model, sand cast roughness comparison model, processing surface roughness comparison model, cast surface roughness comparison model, corrosion-resistant surface treatment Sa2.5 and other roughness comparison model. The temperature resistance of the coating of high temperature anti-corrosion coating should be high, the coating should be dense, the corrosion resistance should be strong, can effectively prevent the invasion of oxidizing media, avoid the production of oxidizing lattice.
coating acid resistance alkaline good, high hardness, coating can be long-term fire-resistant barbecue, anti-oxidation and anti-corrosion effect in hot fire, effective anti-oxygen diffusion can reach more than 90%. High temperature anti-corrosion coatings connect the coating with the substation to form a heat-resistant high-temperature anti-corrosion coating with electrochemical protection and physical shielding, especially suitable for long-lasting high temperature protection in high temperature, corrosion environment steel, or other material structures. Coating resistance to acid and alkalinity is good, high hardness, coating can be long-term fire-resistant barbecue, anti-oxidation and anti-corrosion effect in hot fire, effective anti-oxygen diffusion can reach more than 90%. High temperature anti-corrosion coatings connect the coating with the substation to form a heat-resistant high-temperature anti-corrosion coating with electrochemical protection and physical shielding, especially suitable for long-lasting high temperature protection in high temperature, corrosion environment steel, or other material structures.
water-based high temperature coating substrate grinding leakage point detection can determine the continuity of the film, stable thickness, to help find the anti-corrosion layer is too thin, leakage of metal or the presence of pinholes, but also the structure of complex products film thickness measurement of an effective auxiliary means. The instrument used is an electric spark detector. Special coatings, such as 1021 high temperature closed coatings, the typical thickness of less than 125 m, but it is not recommended to use cross-craing method. When using the cross-craying method, it is necessary to distinguish the spacing according to the thickness of the membrane. If the teeth are blunt, repair them in time. Judge whether the water-based high temperature coating has dry curing, with nail pressing, observe whether there is indentation powdering.