NACE CIP 2 EXAM. QUESTIONS AND ANSWERS.

Concrete coating characteristics: Used in conjunction with other coating (ie FBE), reduces buoyancy so pipe will sink, applied in many thicknesses, can be applied to any diameter of pipe Field Joint Coatings: Heat shrink sleeves, insulation half shells, field foam, liquid epoxy, cold applied tapes, hot applied tapes, FBE field joints, petrolatum (wax) tapes. Non Distructive heat shrink sleeve test- Destructive test for heat shrink sleeves Repairing FBE Reasons to paint wood Non Ferrous Substrates include: stainless steel, nickel, copper/nickel alloys, aluminum, aluminum bronzes, copper, bronzes, brass, tin, cadmium, lead, magnesium, zinc Special substrates that have tightly adherent oxide films Stainless steel, nickel, tin and cadmium Life cycle of coating system can be affected by steel in question, cost, service atmosphere, product and maintenance Galvanized coatings consist of 3 distinct iron-zinc compounds Gamma 75%Zn/25%Fe Delta 90%Zn/10%Fe Zeta 94%Zn/ 6%Fe Eta (outer layer) 100% Zinc not considered separate layer Major stages of the hot dipped process surface prep, fluxing, dipping, post treatment and inspection Caustic cleaning solution that removes the dirt, oil and grease from the steel surface Pickling Post treatments sometime performed on galvanized material Reduction of coating thickness: rolling, wiping, blasting. Improvement to properties or appearance- chromating, phosphating, light rolling/ roller leveling. Change in properties- convert to an alloy. Aluminum can be anodized and dyed attractive colors Common problems during visual inspection of hot dip galv items Methods of Thermal Spray Application Solvent borne IOZ- common failure to cure reason Low humidity because they cure by solvent evaporation and chemical reaction by absorption of moisture from the surrounding atmosphere.