Chapter 11 - Surface Preparation Instruments

Question 1

If inspection is to be effective with regards to soluble salts, the specification should very clearly state?

Answer 1

Limits to be accepted
Specific salts to be limited
Test method to be used
Frequency of testing
Locations in which tests should be administered

Question 2

Test for soluble salts include

Answer 2

Bresle patch
Sleeve test
Soluble salts meters
Conductivity meters

Question 3

Depth of surface profile can be evaluated by several methods

Answer 3

ISO comparator
Replica tape
Digital profile gauge

Question 4

The ISO comparator grades may be recorded by?

Answer 4

Finer-than-fine grade
Fine grade
Medium grade
Coarse grade
Coarser-than-coarse grade

Question 5

The two types of replica tape are commonly used?

Answer 5

Coarse-for 20 to 50 um (80 to2.0 mills)

X-coarse - for 37 to 112um (1.5-4.5mils)

Question 6

List the standards for using the replica tape?

Answer 6

ASTM D4417 Method C

NACE SP 0287-2002

Question 7

When using replica tape common errors include?

Answer 7

Variation in point to point profile over the surface being tested
The presence of particles of dirt on either the replica tape or gauge
Gauge accuracy
The rubbing or burnishing technique

Question 8

Types of soluble salt contamination include?

Hint: we do it for enbridge BG

Answer 8

Chlorides
Sulfates
Nitrates