CIP 1 Surface Prep

Question 1

During surface preparation, surface cleanliness should be inspected at a minimum the following three times

Answer 1

• Before surface prep
• After surface prep
• Before application
• Between each application of coating in a multi-coat system

Question 2

Common design defects include

Answer 2

• Hard to reach inaccessible areas
• Rivets bolts or other connectors
• Welds;
• Gaps;
• Overlapping’s surfaces;
• Angle iron badly orientated;
• Threaded areas;
• Dissimilar metals;
• Sharp edges;
• Construction aids

Question 3

Common fabrication defects including

Answer 3

• Weld splatter
• skip welds
• Rough welds
• sharp corners and edges

Question 4

For typical SSPC SP1 pre-cleaning methods

Answer 4

• Solvent wipe with cloth
• Emursion of the substrate in solvent;
• Solvent spray; vapor degreasing;
• Steam cleaning;
• Emulsion cleaning;
• Chemical paint stripping;
• Use of alkaline cleaners

Question 5

standards for used with PowerTool cleaning

Answer 5

• ISO St 2
• ISO St3
• SSPC SP-3
• SSPC SP-11

Question 6

For examples of tools used for PowerTool cleaning

Answer 6

• Rotary wire brushes
• Impact tool; needle scaler
• Rotary scaler
• Piston scaler
• Grinders and Sanders
• Disc Sanders

Question 7

Two abrasive blasting methods

Answer 7

• Centrifugal blasting
• Sand injected waterblast
• Slurry blast
• Wet abrasive blasting
• Dry abrasive blast cleaning

Question 8

Visual standards for abrasive blasting include

Answer 8

SSPC-Vis 1 and ISO 8501-1

Question 9

NACE 1, NACE 2, NACE 3 allows staining to what percentages

Answer 9

NACE 1= 0%
NACE 2= 5%
NACE 3= 33%

Question 10

Two types of abrasive blasting nozzles

Answer 10

Straight, Venturi

Question 11

The specified level of surface cleanliness must be achieved and maintained

Answer 11

Immediately prior to coatings application

Question 12

Visual comparator standard

Answer 12

SPO178

Question 13

Visual standard ISO

Answer 13

ISO8501-1

Question 14

Dust -standard acceptance

Answer 14

ISO 8502-3

Question 15

NACE 1

Answer 15

SSPC SP5

Question 16

NACE 2

Answer 16

SSPC SP 10

Question 17

Blotter test

Answer 17

ASTM 4285

Question 18

Chlorides test

Answer 18

Bresle Patch Test

Question 19

Indication of Bresle Patch Test

Answer 19

Change in color

Question 20

Theoretical coverage

Answer 20

Theoretical coverage is the calculated area (usually in square feet or square meters) that a coating can cover per unit volume, assuming:

A uniform thickness (typically 1 mil or a specified DFT)

No material loss due to overspray, spillage, surface texture, or waste

Formula:
TheoreticalCoverage(ft²/gal)=1604×%volumesolidsDFT(mils)TheoreticalCoverage(ft²/gal)=
DFT(mils)
1604×%volumesolids
​

Question 21

Factors during surface preparation that may affect service life

Answer 21

Residues of oil grease and soil; of non-visible chemical salt; rust on the surface; loose or broken mill scale; rust scale; anchor pattern; defects mechanical clean equipment; surface condensation; old coatings poor adhesion; existing coating that may be Incompatible