How to do anticorrosive coating construction in summer?
The summer weather is hot and the temperature rises, but the construction work must go on as usual. Anti-corrosion coating construction, there may be a variety of defects, such as paint after construction. Understand the causes and preventive measures of anti-corrosion paint, can be solved in time when the problem, to avoid the waste of materials and a long time to delay the construction progress.
Hair is due to the uneven color of the surface of the film, the phenomenon of stripes, stripes and color disorder.
The causes of corrosion resistant paint may be the following:
1) the pigment in the anticorrosive coating is poorly dispersed or more than two kinds of color paint is not mixed adequately, the dissolving power of the solvent is insufficient or the construction viscosity is inappropriate;
2) the thickness of the film is not uniform, so that the paint in the film surface convection;
3) Poor spraying technology. Not in accordance with the three principles of spraying (spraying distance, spraying speed, drawing lap width) operation;
Preventative measures:
1) Choose pigments with good dispersion and miscibility;
2) Select appropriate solvent, meet the process requirements viscosity and film thickness;
3) The deployment of compound paint should use the same type of paint, it is best to use the same type of paint produced by the same manufacturer;
4) The use of good spraying technology, spray pattern lap width should be maintained, before and after the lap degree of effective spray 1/4~1/3
Remedial method: after spraying the top coat, the phenomenon of hair in the wet film appears, wait for the paint to dry a little, and then spray a correct top coat; After drying the body of the phenomenon of hair, should be polished repair finish paint to drying.
