– Coating Project Specification

Chapter 9 – Coating Project Specification

1. List five (5) of the formal sections usually contained in a good specification. Scope of work

Terms and definitions Reference standards and codes Safety Pre-job conference Surface preparation Coating materials (includes the coating schedule) Sampling coatings Workmanship Application Work schedule (sequence of work to be done) Repairs and remedial coating work Inspection Documentation

2. What are two of the inspector’s responsibilities as it relates to the specification?

Enforce the specification. Do NOT to make changes to the specification.

Chapter 10 – Surface Preparation

1. During surface preparation, surface cleanliness should be inspected (as a minimum) the following three (3) times:

Before any surface preparation activities After surface preparation, before coating begins

Between each application of coating in a multi-coat system

2. Factors during surface preparation that may effect service life include: Residues of oil, grease, and soil

Residues of (non-visible) chemical salts Rust on the surface Loose or broken mill scale Rust scale Anchor pattern Defects mechanical cleaning equipment Surface condensation Old coatings that may have poor adhesion or may be too deteriorated for recoating

CIP Level 1 —Study Guide Answers

3. Common design defects include:

Hard-to-reach or inaccessible areas Rivets, bolts, or other connectors Welds Gaps (particularly skip welds or surfaces close together) Overlapping surfaces (e.g., roof plates in water tanks) Angle iron badly oriented or in complex arrangements Threaded areas Dissimilar metals Sharp edges, particularly on corners or rough cut plate Construction aids

4. Common fabrication defects include: Weld Spatter

Skip Welds Rough Welds Sharp Corners & Edges

5. Four (4) Typical SSPC SP1 pre-cleaning methods include: Solvent wipe with cloth or rag

Immersion of the substrate in solvent Solvent spray Vapor degreasing Steam cleaning Emulsion cleaning Chemical paint stripping Use of alkaline cleaners

6. One Standard for use with Power Tool Cleaning is: ___________________________ ISO St2

ISO St3 SSPC SP-3 SSPC SP-11

7. Four (4) Examples of tools used for Power Tool Cleaning are: Rotary Wire Brushes

Impact tools Needle Scaler Rotary Scalers Piston Scalers Grinders and sanders Disc Sanders

8. Two (2) Abrasive Blasting methods include: Centrifugal blasting

Sand-injected water blast Slurry blast Wet abrasive blast Dry Grit Blast Cleaning (Air Blasting)

9. Visual Standards for abrasive blasting include: SSPC-Vis 1

ISO 8501-1

CIP Level 1 —Study Guide Answers

10. SSPC SP 10/NACE 2 limits staining to 5% per each unit area

11. SSPC SP 5/NACE 1 limits staining to 0% per each unit area

12. SSPC SP 6/NACE 3 limits staining to 33% per each unit area

13. The two (2) types of abrasive blasting nozzles include: Straight

Venturi

14. The specified level of surface cleanliness must be achieved and maintained immediately prior to coatings application.

15. Advantages of centrifugal blast equipment include: Dust and fines are contained

Abrasives are easily recycled Blasting and priming can be an inline operation General overall economy compared to air blasting No compressors, piping, or air handling equipment needed for wheel blasting

16. The Inspector’s checklist for surface preparation should include: Ambient Conditions

Conditions of substrate Pre-Blast surface cleanliness Shot/Grit size selection Shot/Grit Cleanliness Abrasive Blasting Equipment Surface Profile Surface cleanliness after abrasive blasting Operator qualifications Safety

17. Abrasive media types include: Shot & Grit (metallic)

Crushed Slag Ceramic Grit Silica Sand Garnet Agricultural Abrasives Specialty Abrasives

18. Abrasive media typically used for recycling include: Steel Shot

Steel Grit

19. List the pressure ranges that categorize: Low Pressure Water Cleaning: <34 MPa (5,000 psi) High-Pressure Water Cleaning: 34 to 70 MPa (5,000 to 10,000 psi) High-Pressure Water Jetting: 70 to 210 MPa (10,000 to 30,000 psi) Ultrahigh=Pressure Water Jetting: >210 MPa (30,000 psi)

CIP Level 1 —Study Guide Answers

20. Three (3) types of Water-Blasting include: Grit Blasting with a Shroud

Sand Injected Water Blast Slurry Blast with Grit/Water Mix

21. The NACE-SSPC Waterjetting Standard is: SSPC-VIS 4 and NACE-VIS 7

22. Three (3) Test Methods for surface profile include: Comparator and coupons

Replica tape Digital Surface Profile Gauge