Maintenance Coating Operations

Question 1

Define maintenance coating operations.

Answer 1

Defined as applying coatings over a substrate that has been installed in its final environment and has been placed into service

Question 2

Maintenance coating selection process should take what into consideration?

Answer 2

• Compatibility with existing coating system
• Condition of existing coating
• Limitations on surface preparation
• Manufacturer’s recommendation

Question 3

What is one technique that is required in maintenance coating operations that is not encountered in new work?

Answer 3

Feathering

Question 4

Maintenance Coating Operations

If the coating to be applied is incompatible with the existing coating system, what may occur?

Answer 4

Curling

Question 5

Maintenance Coating Operations

What test (if allowed) may be performed to determine the adhesive strength of the coating to be repaired to the substrate and the bond between the new and old coatings?

Answer 5

Adhesive test

Question 6

You are the inspector on a project that is planning for repairs and overcoating an existing structure. Before any work is performed what pre-inspection challenges might you look for?
A. Blistering
B. Loss of adhesion
C. Under-film corrosion
D. Contaminates such as chalking, oil, grease, dirt

Answer 6

A. Blistering
B. Loss of adhesion
C. Under-film corrosion
D. Contaminates such as chalking, oil, grease, dirt

Question 7

You are called to inspect a project where the existing coating system is unknown. It is a good practice to _______ prior to the overcoat process.
A. Evaluate adhesion of the existing coating
B. Attempt to determine the existing coating composition
C. Remove contaminants and abrade surface
D. Direct the contactor to waterjet the coating to NACE 2

Answer 7

A. Evaluate adhesion of the existing coating
B. Attempt to determine the existing coating composition
C. Remove contaminants and abrade surface

Question 8

The process of working back or ‘sanding’ the edges of existing coatings to achieve a ‘fairly’ smooth transition to the sound coating is called ___________.
A. Spot blasting
B. Wicking
C. Feathering
D. Stripping

Answer 8

C. Feathering

Question 9

Which of the following are elements of a good maintenance coating operation?
A. Pre-job inspection
B. Surface preparation
C. Application
D. Inspection and reporting

Answer 9

A. Pre-job inspection
B. Surface preparation
C. Application
D. Inspection and reporting