PCS Coating Systems and Specifications Flashcards

What document defines the coating system requirements, surface preparation standards, and acceptance criteria for a project?

Answer: Coating specification

A coating specification is the binding document that defines all technical requirements for a coating project, including prep standards, products, and acceptance criteria.

Which coating system type is most commonly specified for structural steel exposed to industrial atmospheric conditions?

Answer: Three-coat zinc/epoxy/polyurethane system

A three-coat zinc primer, epoxy intermediate, and polyurethane topcoat system provides optimal corrosion protection and durability for industrial atmospheric steel.

When a coating specification calls for a 'DFT' of 3–5 mils, what does DFT stand for?

Answer: Dry Film Thickness

DFT stands for Dry Film Thickness, the measured thickness of a cured coating layer expressed in mils (thousandths of an inch) or microns.

A generic coating specification references 'SSPC-PS Guide 20.00.' What type of information does this guide provide?

Answer: Coating system selection guidance by environment

SSPC-PS Guide 20.00 provides guidance for selecting appropriate coating systems based on the service environment and substrate type.

Which factor is MOST critical when selecting a topcoat resin type for a coating system exposed to UV radiation outdoors?

Answer: UV stability and chalk resistance

UV stability and chalk resistance are the primary topcoat selection criteria for outdoor exposure to prevent color fading and film degradation.

What is the purpose of a 'tie coat' (also called an intermediate coat) in a multi-coat coating system?

Answer: To promote adhesion between incompatible coating layers

A tie coat promotes adhesion between two coating layers that would otherwise be incompatible, ensuring intercoat bond integrity throughout the system.