Vocabulary

Question 1

Passivation

Answer 1

Occurs when the byproducts of corrosion prevent future corrosion.

Question 2

Corrosion

Answer 2

Environmentally caused deterioration

Question 3

Corrosion Cell

Answer 3

Anode Cathode Electrolyte Return Path

Question 4

Anode

Answer 4

The part of a metal that corrodes. The Anode loses positive ions through the electrolyte, and electrons through the return path

Question 5

Cathode

Answer 5

The cathode consumes electrons and emits ions. The cathode is less active than the anode.

Question 6

Return path

Answer 6

Allows the flow of electrons to the cathode

Question 7

Electrolyte

Answer 7

Allows the movement of ions between the anode and the cathode

Question 8

Mill scale

Answer 8

Iron oxide scaling on new steel surfaces. Cathodic - must be removed.

Question 9

Galvanic series

Answer 9

Ranking of metals from least active (bottom) to most active (top). Nobler metals such as platinum, are at the bottom, while more active metals such as magnesium and zinc, are at the top.

Question 10

Corrosion inhibitor

Answer 10

Added to the environment to inhibit corrosion. Usually added to the electrolyte.

Question 11

Cathodic Protection

Answer 11

Uses sacrificial anodes or an impressed current to protect a surface from corrosion.

Question 12

Alkaline Cleaners

Answer 12

Saponify most oils and greases, and surface-active components wash away other contaminants.

Question 13

Ceramic Grit

Answer 13

Relatively expensive abrasives with sharp cutting edges. Good for hard base msterials.

Question 14

Crushed Slag

Answer 14

Relatively cheap abrasives created by metallurgical processes. Copper, nickel, coal and aluminum slag are common,

Question 15

Detergents

Answer 15

Soaps for washing a surface.

Question 16

Dry grit blasting (Air Blasting)

Answer 16

Blasting that uses a highly concentrated stream of grit. Creates a rough surface profile

Question 17

Emulsion cleaners

Answer 17

Soapy spray that cleans the surface

Question 18

Sleeve Test

Answer 18

Used to determine if there is an unacceptable amount of soluble salts on a surface

Question 19

ISO Comparators

Answer 19

Visual tools for evaluating surface profile. Cards that work like color match tiles.

Question 20

Chlorides

Answer 20

hydrochloric acid HCI salts.

Question 21

nitrates

Answer 21

Nitric Acid salts

Question 22

Sulfates

Answer 22

Sulfuric Acid salts.

Question 23

Barrier Coating

Answer 23

A coating that

Prevents contact with environment

Highly resistant to liquids or gasses

used to protect an existing coating

Question 24

Binder

Answer 24

nonvolatile portion of the vehicle of a coating material

Question 25

Inorganic coatings

Answer 25

coatoings whose binders are inorganic, most commonly based on silicone or zinc

Question 26

Organic coatings

Answer 26

based on petroleum products, or other living agents

Question 27

Inhibitive pigment

Answer 27

passivates the metal surface by forming a thin, tightly adherent film. Reinforces and plugs defects in the air-formed film

Question 28

Solvents

Answer 28

added to coatings to liquify the binder

Question 29

Curing

Answer 29

The process where the coating becomes protective over time

Question 30

Acrylic

Answer 30

A type of resin that is polymerized from acrylic acid, or: methacrylic acid

Question 31

Alkyd

Answer 31

(Oil based coatings) a type of resin that is formed by the reaction of: polyhydric alcohols and polybasic acids part of which is derived from oils or fats

Question 32

Convertible Coatings

Answer 32

coatings that cure from one of several polymerization methods, even when solvent evaporation is involved

Question 33

Epoxy

Answer 33

A type of resin formed by a reaction of epi-chloro-hydrin and polyols formed by the reaction of aliphatic or aromatic polyols with epichlorohyrdin.

Question 34

Chlorinated Rubber

Answer 34

one of the earliest protective coatings

Question 35

Furan

Answer 35

a type of resin formed by the reaction of the polymerization of furfuryl, furfuryl alcohol or other furfuylic compounds

Question 36

Latex Emulsions

Answer 36

coatings that can contain a number of different resin particles, that are covered by an emulsifier to keep them apart in the liquid stage

Question 37

Nonconvertible coatings

Answer 37

Coatings that cure by solvent evaporation no chemical change to the resins as they tranform from liquid to solid state

Question 38

Phenol

Answer 38

organic chemical used in a wide array of manufactured items

Question 39

Thermosetting

Answer 39

Permanently hardening or solidifying on being heated. a coating that is formed as a result of a chemical cross-linking reaction, such as polymerization or heat or an additive reaction

Question 40

thermoplastic

Answer 40

A material capable of being repeatedly softened by heat and hardened by cooling

Question 41

Psychrometric tables

Answer 41

used after the psychrometer readings are obtained come from the US Department of Commerce Weather Bureau **determine the relative humidity and dew point**

Question 42

psychrometric chart

Answer 42

is a graph of psychrometric data graphs the physical properties of air moisture

Question 43

List 5 of the formal sections usually found in a good specification

Answer 43

scope of work terms and definitions refrence safety and codes surface preparation expectations coating materials documentation and reporting

Question 44

ASTM Cups

Answer 44

Standard laboratory cups for testing viscosity

Question 45

Alkyd Resins

Answer 45

resins prepared by reacting alcohols and acids

Question 46

Curing

Answer 46

Setting up, hardening

Question 47

Potassium ferricynide

Answer 47

Used to test for water soluble forrous salts.

Question 48

Types of soluble salt contamination includes:

Answer 48

Chloride contamination Sulfate contamination Nitrate Contamination