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AMPP CIP LEVEL 1 - Basic Coating Inspector Theory Questions and Answers 2024
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AMPP CIP LEVEL 1 - Basic Coating Inspector TheoryQuestions and Answers 2024
What are Volatile Organic Compounds (VOCs)? - Ans - Chemicals that easily evaporate at room
temperature.
What are solvents? - Ans - Substances that dissolve other substances to form a solution.
Why can solvents in coatings be harmful? - Ans - Because they can release VOCs into the air.
What are some examples of solvents used in coatings? - Ans - Acetone, toluene, xylene, and ethyl
acetate.
What are three commonly used galvanic anodes for carbon steel? - Ans - Zinc, Aluminum, and
Magnesium
What is the effect of temperature on corrosion rate? - Ans - Decrease in temperature decreases
corrosion rate.
What is an electrolyte? - Ans - A medium that carries ionic current.
What is sacrificial coating? - Ans - A type of coating that becomes the anode of an electrochemical cell.
What is the role of binders in coating? - Ans - Binders form a stable film that retains its properties.
What is a barrier coating? - Ans - A coating that interrupts the electrolyte of an electrochemical cell.
What are two environments most susceptible to corrosion? - Ans - Marine Environment, Chemical with
High Humidity Environment
What is the direction of electron flow in an oxidation reaction? - Ans - From the anode to the cathode
through the metallic path.
What is the role of binders? - Ans - Binders bonds pigments together and adhere to surface.
What are solvents? - Ans - Solvents are liquids that dissolve the solid resins.
What is the purpose of pigments? - Ans - Pigments hide the substrates, provide decorative color, and
enhance desired properties.
,What are additives? - Ans - Additives are special purpose ingredients used to enhance the performance.
What are vehicles? - Ans - Vehicles are the liquid portions of the coating.
What is corrosion? - Ans - Deterioration of metal or alloy due to electrochemical reaction.
What is passivation? - Ans - Layer of oxides on metal surface for corrosion protection.
Give an example of a metal that undergoes passivation. - Ans - Stainless steel
What is an anode? - Ans - The electrode where oxidation occurs.
What is a cathode? - Ans - The electrode where reduction occurs.
What is a metallic pathway? - Ans - The conductive path for electrons to flow.
What are electrolytes? - Ans - Substances that conduct electricity when dissolved in water.
What is the function of an electrolyte in corrosion? - Ans - Allows passage of ions in corrosion cell.
What is the function of a metallic pathway in corrosion? - Ans - Allows flow of electrons in corrosion cell.
What is the galvanic series? - Ans - Listing of metals in order of reactivity.
What is the general rule of the galvanic series? - Ans - Less noble metal connected to a more noble
metal will corrode preferentially.
What is localized corrosion? - Ans - Corrosion that occurs in specific areas.
What are the types of localized corrosion? - Ans - Pitting and crevice corrosion.
Why is localized corrosion concerning? - Ans - Damage is concentrated and can lead to structural failure.
What is general corrosion? - Ans - Uniform loss of material over entire surface.
How does general corrosion affect the surface? - Ans - Results in general thinning of affected surface.
Is general corrosion easy to inspect? - Ans - Yes, it is relatively easy to inspect.
Does general corrosion cause catastrophic failure? - Ans - No, it does not cause catastrophic failure.
What is inorganic convertible thermosetting? - Ans - Coating that undergoes irreversible chemical
changes upon curing.
What is inorganic non-convertible thermoplastic? - Ans - Coating that softens upon heating and hardens
upon cooling.
What are the primary components of a liquid applied coating? - Ans - Pigments and Vehicle (Resin or
Binder and Solvent)
, What is a sacrificial coating system? - Ans - A coating system where a more active metal is applied over a
less active metal to act as an anode and protect the underlying metal.
Why is inorganic zinc commonly used as a sacrificial coating over mild steel? - Ans - Zinc is more active
than steel, so it becomes the anode and protects the steel from corrosion.
What is the purpose of a barrier coating? - Ans - To create a physical barrier between the metal surface
and the corrosive environment, preventing direct contact and corrosion.
What is an inhibitive coating? - Ans - A coating that releases corrosion inhibitors to slow down or
prevent corrosion on the metal surface.
How does a sacrificial coating provide corrosion control? - Ans - By using a more active metal as the
coating, it sacrificially corrodes instead of the underlying metal, protecting it from corrosion.
What does a well-written coating specification provide? - Ans - Clear understanding of project
expectations.
Where can an inspector find the procedure for mixing a specified coating? - Ans - Product data sheet
(PDS).
What is a product data sheet (PDS)? - Ans - Document from manufacturers with valuable product
information.
What information does a safety data sheet (SDS) provide? - Ans - Chemical hazards and safety
precautions.
What does a specification document tell the contractor? - Ans - What and where to do, not how to do it.
What is a standard? - Ans - Formal document providing guidance for technical procedures.
What is an Inspection Test Plan (ITP)? - Ans - Quality control tool for ensuring specified requirements are
met.
What is surface temperature? - Ans - Temperature of the surface being coated.
How does temperature affect solvents? - Ans - Affects evaporation time and curing rates, leading to
defects.
What is the minimum and maximum surface temperature for coating? - Ans - Minimum: 40°F (5°C),
Maximum: 125°F (40°C).
What should be the substrate temperature for coating application? - Ans - At least 3°C or 5°F above the
dew point temperature.
What are the effects of high air temperature? - Ans - Shorter pot life, shorter induction time, and lower
viscosity.
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