NACE Study Guide(Evaluations and solutions)2025,Exam code343,,Model 1 ,2025

List 3 desirable properties of a coating. - answer-Chemical resistance, water resistance, ease of application, adhesion to substrate, cohesive strength, flexibility and elongation, impact resistance, abrasion resistance, temperature resistance, dielectric strength Two broad classifications of a coating are: - answer-Organic Inorganic Convertible Non-Convertible Thermosetting Thermoplastic What ate the two primary components of a liquid applied coating - answer-pigmet vehicle (binder or resin and solvent) What are the three methods by which a coating provides corrosion control - answer-Barrier Inhibitive Sacrificial What are the three different ways a coating can adhere to the surface - answer-Mechanical, Chemical and Polar or a combination of all three The two broad classification for curing mechanisms are: - answer-Convertible and Non-Convertible List two Non-Convertible - answer-Chlorinated Rubber and Vinyl List three convertible coating curing mechanisms - answer-Oxidation, co-reaction (polymerization), Hydration, Fusion List two characteristics of oxidation cure coatings - answer-Not suitable for immersion service Not suitable for use over alkaline substrates limited dry film thickness per coat List three coating types that cure by polymerization - answer-Epoxies polyurethanes polyureas polyaspartics polysiloxanies Induction time is - - answer-the time required by the product data sheet (coating manufacturer) between mixing the coating and the start of application. What is a main requirement for a hydration coating to cure? - answer-moisture Industrial and marine coatings are commonly referred to by - answer-Generic resin type Oil based coatins applied over alkaline surfaces may result in - answer-Saponification (soap) during surface preparation, surface cleanliness should be inspected (as a minimum) the following three times: - answer-Before any surface preparation activities. After surface preparation, before coating begins. Bteween each application of coating in a multi-coat system. Factors during surface preparation that may effect service life include: - answer-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. Existing coatings that may be incompatible. Common design defects include: - answer-Hard-t0-reach or inaccessible areas. Rivets, bolts, or other connectors. Welds. Gaps. Overlapping surfaces. Angle iron badly oriented or in complex arrangements. Threaded areas. Dissimilar metals. Sharp edges, particularly on corners or rough cut plate. Construction aids. Common fabrication defects include: - answer-Weld Spatter Skip Welds Rough Welds Sharp Corners & Edges Four typical SSPC SP1 pre-cleaning methods include: - answer-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 One stand for use with power tool cleaning is: - answer-ISO ST2 ISO ST3 SSPC SP-3 SSPC SP-11 Power tool cleaning to bare metals Four examples of tools used for power tool cleaning are: - answer-Rotary wire brushes impact tools needle scaler rotary sclaers piston scalers grinders and sanders disc sanders Two abrasive blasting methods include: - answer-Centrifugal blasting Sand-injected water blast Slurry Blast wet abrasive blast Dry grit blast cleaning Visual Standards for abrasive blasting include: - answer-SSPC-Vis 1 ISO 8501-1 SSPC SP10 / NACE 2 limits staining to _ per each Unit area - answer-5% SSPC SP 5/ Nace 1 limits staining to _ per each unit area - answer-0% SSPC SP 6/ NACE 3 limits staining to _ per each unit area - answer-33% the two types of abrasive blasting nozzles include: - answer-Straight Venturi