Multi-Coat Failure is defined by which description?

Multi-Coat Failure is defined by which description?

• A. Several of the top layers of paint or other coatings are delaminating from layers below
• B. Top layer peeling
• C. Paint rubbing due to friction
• D. Pieces of paint loosened due to impact

Answer: (A)

Multi-Coat Failure happens when several of the upper coatings have delaminated from the layers beneath, meaning the bond between coats has failed and multiple coats are separating together. This describes a loss of adhesion across interfacial layers, not just an isolated peeling of the surface. It’s different from top-layer peeling (which usually involves only the outer coat) and from damage caused by friction or impact, which are wear or shock mechanisms rather than interlayer adhesion failures.

Multi-Coat Failure happens when several of the upper coatings have delaminated from the layers beneath, meaning the bond between coats has failed and multiple coats are separating together. This describes a loss of adhesion across interfacial layers, not just an isolated peeling of the surface. It’s different from top-layer peeling (which usually involves only the outer coat) and from damage caused by friction or impact, which are wear or shock mechanisms rather than interlayer adhesion failures.