NACE CIP 2 Study Guides Rated A

NACE CIP 2 Study Guides Rated A What is the cause of chalking in epoxy coating UV or radiation exposure What is polymerization cured coating? Two parts mixed together just prior to use Examples of non-convertible coatings 1. Chlorinated rubber 2. Vinyl 3. Acrylic 4. Bituminous Non-convertible curing def. No chemical change during cure cycle Convertible curing def. Some chemical change during cure cycle What info should be included when sending samples to a lab? 1. Identity of materials 2. Properly packed/labeled samples 3. Chain of custody form 4. Type of analysis that is expected and the concentrations of interest Specialized tests or equipment coating inspectors may encounter 1. AA/AE Atomic Absorption/Emission 2. ISP Induction coupled plasma Spectrometer 3. GLC Gas liquid chromatographs 4. IR, FTIR, FTIR-ATR INfrared spectrophotometers 5. DSC Differential scanning calorimeters What is a cathodic dis-bondment test? Procedure to determine how easily a coating loosens from a substrate or develops holidays as a result of normal soil potentials Individuals who perform surveys 1. O-Cat or S-cat tech 2. NACE coating specialist 3. NACE Level III 4. Coating Inspector w/field experience 5. Coating manufacturer representative 6. Maintenence engineer with specific plant knowledge. Coating survey steps 1. Understand scope 2. Gather team 3. Develop survey plan 4. Review standards 5. Agree on format 6. Delegate various tasks 7. Eveluate existing coating 8. Delegate various tasks 9. Evaluate existing coating 10. Gather additional info 11. Summarize data 12. Prepare maintenance plans 13. Prepare reports/input data 14. Submit final survey reports. List some of the primary reasons surveys are performed 1. Plan maintenance. 2. Prioritize work 3. Budgetary concerns 4. Determine value of assets 5. Legal compliance Definition of a coating survey Gather baseline info needed to plan maintenance coating procedures What are faying surfaces and why not galvanize them? Surfaces that depend on friction to hold galvanizing it may/will reduce friction if they are galvanized Common problems seen during the usual inspections of HD galvanized items 1. Cracking 2. Peeling 3. Bare spots 4. Lumps 5. Blisters 6. Flux inclusions 7. Ash inclusions 8. Dross inclusions Post galvanizing treatments and why To Remove Thickness: Roll, Wipe, Centrifuge/Air Blast To change properties/To alloy: Annealing Temperature range for galvanizing kettle 820-850 F Purpose of pickling Hydrochloric or sulfuric acid bath to remove oxides and mill scale Purpose of caustic cleaning Acid bath or caustic to remove dirt, oil and grease Stages of hot dip process 1. Surface prep. 2. Galvanizing 3. Post treatment 4. Inspection Hot dip galvanizing safety 1. Can stay for some time 2. Molten metal splash 3. Nascent hydrogen above kettle Usual layers of galvanized coating consists of: 1. ETA=100% Zn 2. ZETA= 94% Zn 6%Fe 3. DELTA= 90% Zn 10 Fe 4. GAMMA= 75% Zn 25% Fe What is hot dip galvanizing? Coating iron or steel with zinc at temperatures of 820-860 F If a maintenance coating to be applied is incompatible with the existing coating system__________may occur Curling ______________ is performed at the work area by working the edges of the repaired area back to achieve a fairly smooth transition from the repair area to sound coating. Feathering With regards to maint. coating all parties should agree on___________? 1. Spot repair requirements 2. Feathering 3. Appearance of repaired areas Maint. coating selection process should take the following into consideration: 1. Compatability with existing system 2. Surface prep. 3. If abrasi ve blast is permitted and feasible When determining coating system life cycle the following should be considered: 1. Maint. costs 2. Length of coating life 3. Initial and maint. material costs 4. Intial and maint. labor costs Life cycle of a coating system can be affected by: 1. Service environment 2. Maint. intervals 3. Coating system chosen 4. Surface condition Maint. coating operations are defined as: Applying coating over a substrate that has been installed in its final environment and placed in service Some service situations where permeation may occur include: 1. Sour crude storage tanks 2. Cooling towers 3. Fertilizer plants Special substrated that have tightly adherent oxide films include: 1. Stainless steel 2. Tin 3. Nickel 4. Cadmium Non-Ferrous substrates include: 1. Stainless steel 2. Nickel 3. Copper/Nickel alloys 4. Aluminum 5. Aluminum bronzes 6. Copper 7. Bronzes 8. Brass 9. Tin 10. Cadmium 11. Lead 12. Magnesium Common reasons wood is coated 1. Decoration 2. Protection 3. Sealing 4. Stabilization 5. Preservation 6. Flame retardence The following materials can be used to repair fusion bonded epoxy: 1. Epoxy FBE melt sticks 2. LIquid epoxy 3. Repair patches Destructive tests for heat shrink sleeves include_____________ Peel test Non destructive tests for heat shrink sleeves include 1. UT 2. Physical inspection 3. Holiday inspection Pipeline coating field joints include 1. Heat shrink sleeves 2. Insulation 1/2 shells 3. Liquid epoxies 4. Cold applied tape 5. Hot applied tape 6. Fusion bonded epoxy 7. Wax tape Concrete coating characteristics include: 1. Good for wetlands 2. Can be applied in may thicknesses General application for CTE includes 1. Prime pipe 2. Apply CTE dope 3. Wrap w/glass fiber mat 4. Apply 2nd coat of CTE dope 5. Apply 2nd layer of glass met 6. Apply outer wrap of CTE impregnated glass fiber felt. 7. Cool Disadvantages of CTE coatings include: 1. Environmental concerns 2. Subject to corrosion and damage from soil stress Advantages of CTE pipeline coatings 1. Ease of application 2. Long life FBE process includes: 1. Preheat 2. Grit/shot blast to NACE #2 SSPC-SP10 3. Heat pipe 4. Apply coating