✨Does coating disbond from the metal substrate because of increasing thickness during maintenance coating?
🌟 Overcoating an existing coating can cause the coating to disbond.
🌟Bond strength is determines whether the original coatings is “sound” or need total removal.
🌟Depending upon the type of coating, generally, all coating tends to lose adhesion with age.
🌟One dominant physical limitation is caused by the difference in thermal coefficient of expansion(CE)
🌟Example: Epoxies have CE that can be 4 to 10 times that of steel. Even in moderate climates.
🌟Intercoat delamination depends on surface preparation and film thickness of the previous coat. Also, the type of paint materials is considered.
