Definition of peeling coating:
Loss of adhesion between a coating and a substrate or another coating.
Possible causes:
Surface contamination or surface condensation
Precaution:
Ensure surfaces are clean, dry and free of any contamination;
Surface through the appropriate material;
Construction according to the requirements of the manual.
repair:
Follow peeling procedures, remove imperfections, apply proper surface preparation; use correct paint system as recommended by paint manufacturer
There is an important detection factor for the above problems: the adhesion of the coating
Tool: TQC cross-hatch adhesion Tester
Test principle:
The cross-cut method is a test method for measuring the adhesion of dry coating on the surface. A row of 6/11 blades is used between the two outer wires to draw 25/100 squares. out ratings. Measures the adhesion of dry coated paint to a substrate by means of a series of cuts. Cut two parallel lines that cross perpendicularly to get 25 or 100 squares. Assess the area where parallel lines intersect on a tabletop and treat with a stiff brush for a short period of time or with tape on a hard substrate.
According to the experimental results, refer to the following adhesion comparison table for rating:
