The culprit was the "solvent congestion" of the pinholes in the molten zinc coating.
Dop plating has a low volatility of the paint solvent. Sweep blasting is effective.
In molten zinc-coated materials, gas generation due to surface reactions can sometimes cause pinholes. Particularly when the coating surface is too smooth, solvents in the paint can become trapped. Additionally, if white rust or surface contamination remains, reactions can progress during curing, leading to the formation of holes in the coating. Effective countermeasures include sweep blasting and the use of specialized primers. Thickness management is also important, as care must be taken to avoid solvent entrapment due to excessive coating thickness. Detailed examples of improvements are also provided in publicly available documents.
- Company：永和工芸
- Price：Other
