Cause of paint failure onboard ship?

Answer 1

Mariners are engaged in a constant battle against corrosion and often feel that they are on the losing side. The ocean is a relentless enemy and the salt-laden elements constantly expose weaknesses in paint systems in their quest to turn steel into rust.

Ø Poor surface preparation.

Ø Painting in an unfavourable environment. (Ideal Condition 10oC to 32oC and ᶲ 90%)

Ø Under estimating the corrosive nature of sea air and not applying enough paint coats.

Ø Using paint which is too thick or too thin.

Ø Incorrect mixing of two pack paints.

Ø Prolonged exposure to the environment. (engine fumes)

Ø Expansion and contraction of the metal surface which loosens inelastic paint.

Ø Excessively high temperature which causes cracking.

Ø Paint application by incorrect methods. (Wrong nozzle size)

Ø The use of incompatible coats. Incorrect primer for a following coat.

Ø The use of unsuitable paints in specific areas.

Ø Poor design.

Ø The use of unsuitable barrier paints beneath anti-fouling.

Ø Chipping of paint surface during normal working operations.

Ø Abrasion due to the vessel landing heavily on the quayside.

Ø Insufficient drying time between coats.

Answer 2

Paint failure onboard ships can be caused by factors such as improper surface preparation before painting, application of low-quality paint or incorrect paint system, exposure to harsh marine environments (saltwater, UV radiation), mechanical damage, or improper maintenance. Regular inspections, proper surface treatments, and using high-quality marine-grade paints can help prevent paint failure.