Maintenance coating operations

Question 1

Define maintenance coating operations?

Answer 1

Applying coatings over a substrate that has been installed in its final environment and has been placed in service

Question 2

The life cycle of a coating system can be affected by?

Answer 2

The steel in question
Costs
The service atmosphere
Product
Maintenance

Question 3

When determining the coating system life cycle, the following should be considered

Answer 3

The particular coating system to be used
The initial cost
Time until first maintenance
Maintenance cost during the life of the coating system
The length of time the product will last
The maintenance cost per year
The cost over the life of the system

Question 4

Maintenance coating selection process should take the following into consideration?

Answer 4

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

Question 5

With regards to maintenance coatings all parties should agree on?

Answer 5

Spot repair requirements
Feathering
Appearance of repaired areas

Question 6

Define feathering?

Answer 6

Feathering is performed at the repaired area by working the edges of the repaired area back, to achieve a fairly smooth transition from the repair area to the sound coating

Question 7

What may happen if a maintenance coating is incompatible with the existing coating?

Answer 7

If the maintenance coating is incompatible, curling may occur.

Question 8

Some service situations in which permeation may occur include?

Answer 8

Sour crude storage tanks
Cooling towers
Fertiliser plants