Edge failure of corrosion-resistant coating
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Coating failure usually starts at the edges, as the coating is generally weakest there. Edge failure of the coating usually begins with rusting, which eventually spreads beneath the coating film. If the edges of the coating have lost their resistance to damage, the entire edges should be recoated. The remedial measure is to perform local cleaning followed by repainting with sufficient paint to achieve an appropriate thickness.
Why do the edges of the coating break easily? Because the coating is thinnest at the edges, its protective capacity is weakest there. Rust usually starts at the edges, and then it gradually spreads beneath the coating. If it is found that the edge is damaged, it needs to be dealt with promptly: first clean the rusty areas, then apply a thick layer of paint to repair the edge. It’s best to repaint the entire edge to prevent the problem from spreading. .