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AMPP > Fundamentals of Protective Coatings - C1 > Flashcards

Fundamentals of Protective Coatings - C1 Flashcards

1
Q

Which metal would never be used in sacrificial anodes for cathodic protection of steel?

A

Platinum

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2
Q

Which surface preparation method is used to create a surface profile?

A

Abrasive blasting

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3
Q

What is the minimum level of surface cleanliness required when applying an inorganic zinc rich coating?

A

SSPC-SP 3

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4
Q

What is the purpose of the lockout/tagout procedure?

A

To prevent injury to personnel from equipment

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5
Q

Why is it best not to overmix a coating before application?

A

To minimize entrapment of air bubbles in the coating

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6
Q

On which steel surface would a 3-coat silicone alkyd system be most appropriate?

A

Exterior of a water tank in a mild environment

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7
Q

Which item below can best be used to determine if chalking of a coating is too great for good topcoat adhesion?

A

A dark felt cloth

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8
Q

What chemical action takes place at the anode during corrosion?

A

Loss of metal

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9
Q

Which invisible contaminant can affect coating performance if not removed by cleaning of the steel before coating application?

A

Soluble Salts

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10
Q

Prior to coating application, the substrate and ambient temperatures must be:

A

At least 5° above the dew point and not falling

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11
Q

Which is true of a venturi nozzle as compared to a straight-bore nozzle used for abrasive blast cleaning?

A

It provides a more uniform blast pattern

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12
Q

In which coating application method can the overspray be collected and recycled?

A

Powder spray

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13
Q

Which coating provides a type of cathodic protection to steel?

A

Zinc-rich coatings

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14
Q

Which coating would perform best on the interior of a storage tank for aviation fuel?

A

Epoxy polyamide

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15
Q

Which U.S. organization addresses industrial hazards to personnel at job sites?

A

OSHA

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16
Q

Which pair of ingredients comprises a coating’s vehicle?

A

Binder and solvent

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17
Q

Which coating system can be used to repair the bottom of a deteriorated steel tank used for storing chemicals?

A

Fiberglass-reinforced vinyl ester

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18
Q

Theoretical spreading rate is defined as:

A

The spreading rate with 0% loss of material

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19
Q

Why is a stripe coat a vital part of the coating process?

A

It allows the applicator to cover edges/welds and other hard to reach places prior to and after topcoating

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20
Q

When a coating’s viscosity increases, what happens to the consistency of the material?

A

The material becomes thicker

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21
Q

Define mill scale.

A

An iron oxide film formed during hot-rolling of steel

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22
Q

Which instrument can best be used to determine the ambient dew point?

A

Psychrometer

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23
Q

Define pot life.

A

Period of time after mixing of components during which a coating can successfully be applied

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24
Q

At which location are you most likely to find an oxygen deficiency?

A

In tanks and other confined spaces

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25
Q

Define bleeding in coatings:

A

Color migration from underlying substrate or coating through new coating

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26
Q

Which statement is always true about corrosion?

A

Anodic and cathodic areas are required

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27
Q

What coating defect is commonly associated with solvent entrapment?

A

Blistering

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28
Q

Why would a calcium chloride test be used on a concrete floor that is to be coated?

A

To measure the rate of moisture migration through the concrete

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29
Q

What type of bristle is best when applying solvent-based coatings by brush?

A

Natural/China bristle

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30
Q

For which service are coal tar coatings most appropriate

A

Underground fuel pipe exterior

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31
Q

Which is a safety device for airless spraying?

A

A trigger lock

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32
Q

What is the most common cause of osmotic blistering of coatings on cleaned steel surfaces?

A

Soluble salt contamination on the steel surface

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33
Q

What is the most common mechanism of corrosion control by coatings?

A

Barrier protection

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34
Q

Why do exterior coatings chalk?

A

Deterioration of binder by sunlight

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35
Q

Why is it important to detect defects in coatings early when they are being applied?

A

Corrective action is easier and less costly then

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36
Q

Which coating is most susceptible to mudcracking when applied too thickly?

A

Inorganic zinc-rich

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37
Q

What is a written, legal document, usually part of a contract, which precisely describes an item of work that is to be accomplished?

A

Specification

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38
Q

What destructive instrument may best be used for measuring dry film thickness of a coating on a concrete surface?

A

Tooke gage

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39
Q

Why are pre-construction primers most often spray applied in a shop?

A

To minimize the necessary field abrasive blasting

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40
Q

To which pipe areas are heat-shrink sleeves typically applied?

A

Welded areas

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41
Q

Which material may be used to control the corrosion of steel reinforcing bars in concrete?

A

Epoxy powder coatings

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42
Q

How does micaceous iron oxide pigment in coatings provide corrosion protection to steel?

A

By reducing ultraviolet light deterioration of coatings

43
Q

Why is it necessary to apply a sealer to concrete?

A

To reduce the porosity

44
Q

What surface defect is associated with two components epoxies, caused by contact with moisture during the curing process?

A

Amine blush

45
Q

Which is true of metallizing?

A

The metallizing is usually sealed for longer service

46
Q

Which coating application method has the greatest production rate?

A

Airless spray

47
Q

Which item can best be used to determine profile height of an abrasive blasted steel surface?

A

Deformable replica tape

48
Q

Which substrate is best prepared per SSPC-SP 16?

A

Aluminum

49
Q

Which cleaning method best removes soluble salts from contaminated surfaces?

A

Waterjetting

50
Q

Which abrasive is a natural mineral product?

A

Garnet

51
Q

Which surface preparation standard defines power tool cleaning?

A

SSPC-SP 3

52
Q

Which SSPC surface preparation standard requires a stated minimum surface profile?

A

SSPC-SP 11

53
Q

Which coating requires straining to remove clumps?

A

Inorganic zinc-rich

54
Q

Define laitance.

A

A loose layer of cement on concrete

55
Q

Which description best defines outgassing associated with concrete?

A

Air that is expelled from concrete porosity during rise in temperature

56
Q

Define induction time:

A

Period of time after mixing of components and before application to permit reaction of components to proceed

57
Q

Which is a non-destructive instrument for measuring dry film thicknesses of coatings on concrete surfaces?

A

Ultrasonic gage

58
Q

Which coating is the most tolerant to outdoor exposure?

A

Waterborne acrylic

59
Q

Which coating has good resistance to the sun’s ultraviolet light?

A

Aliphatic polyurethane

60
Q

What is the most important advantage of plural component coating application systems over other coating spray systems?

A

Very short pot-life materials may be applied

61
Q

Which term best describes a fiberglass-reinforced polyester product?

A

A composite

62
Q

Why are oil-based coatings incompatible with concrete?

A

Concrete has a high alkalinity

63
Q

What defect occurs when an applied coating insufficiently covers the profile on a steel substrate?

A

Pinpoint Rusting

64
Q

What is the chief advantage of HVLP spray equipment over other coating spray systems?

A

Higher transfer efficiency

65
Q

Which of the following application defects could be the result of excessive coating thickness?

A

Mudcracking

66
Q

Which document defines standard surface profiles for concrete surfaces?

A

ICRI No. 310.2

67
Q

What is a significant advantage of petroleum or wax and tape coatings for steel piping as compared to other coating systems?

A

Lower surface cleaning requirements

68
Q

What test can best be used to determine if a thermosetting coating has fully cured?

A

Solvent-rub test

69
Q

When spraying protective coatings, what is the term used to describe when the gun isn’t held parallel to the applied substrate?

A

Arcing

70
Q

Why is a blotter test used in abrasive blasting operations?

A

To detect oil or water in compressed air

71
Q

Which visual reference can best be used to assist in determining the level of cleanliness of abrasive blasted steel surfaces?

A

SSPC-VIS 1

72
Q

Which instrument is best used to determine if a blast nozzle has eroded away to a larger size?

A

Wedge-shaped probe

73
Q

Thermal spray is a form of:

A

Galvanic protection

74
Q

What is a limitation of ultrahigh-pressure waterjetting of new steel?

A

It does not produce a profile

75
Q

What inspection tool is used at the beginning of coating application to determine if the thickness is on target to match specification requirements?

A

WFT gage

76
Q

Why do most free metals corrode?

A

They are in a chemically unstable state

77
Q

What tool is used to measure wet film thickness?

A

A gage with notches of different lengths

78
Q

What is a limitation of conventional air spray as compared to airless spray of coatings?

A

It has a lower application rate

79
Q

Which pair of organizations certifies approval for linings for potable (drinking) water storage tanks?

A

ANSI/NSF

80
Q

Which surface preparation standard is used to remove all visible surface contaminants?

A

SSPC-SP 1

81
Q

What is an advantage of coatings as opposed to other methods of corrosion control?

A

It may impart an attractive appearance

82
Q

Which statement is true for impressed current cathodic protection of underground steel piping?

A

External power is required

83
Q

Why are cartridge respirators test fitted?

A

To ensure that air entering the respirator passes through the cartridge

84
Q

Which document explains the methods for providing extra corrosion protection measures on edges, outside corners, crevices, and welds?

A

SSPC-PA Guide 11

85
Q

Which statement is true about galvanic protection?

A

The metal becomes the cathode

86
Q

Which coating would be expected to perform the best in seawater immersion?

A

Epoxy polyamide

87
Q

What will occur from inadequate coating opacity?

A

Incomplete hiding of substrate

88
Q

Who is responsible for the safety plan on coating jobs?

A

The contractor

89
Q

What is the cause of brush marks and orange peeling on coating surfaces?

A

Inadequate leveling of the wet film

90
Q

What is the most common cause of pinpoint rusting?

A

Too high a surface profile for the coating

91
Q

Which tool can best be used to indicate the strength or soundness of a concrete slab?

A

Rebound hammer

92
Q

Which structural configuration is most commonly associated with concentration cell (e.g., oxygen) corrosion?

A

Crevices

93
Q

Which is a safety requirement for scaffolds used in painting operations?

A

Toe boards and rails

94
Q

Which is a safety device for abrasive blast cleaning?

A

A deadman valve

95
Q

What information is necessary to calculate the theoretical spreading rate of a coating?

A

The total solids by volume in the coating

96
Q

Define recoat window:

A

Period of time after application during which a coating can be successfully topcoated

97
Q

Which coating defect is most likely to occur if a vinyl lacquer is applied over a bituminous coating?

A

Bleeding

98
Q

Why have restrictions been placed on the VOC content of coatings?

A

VOCs react in air to form ozone and other air pollutants

99
Q

Which coating type is most likely to encounter wrinkling problems?

A

Alkyd

100
Q

How is zinc most commonly applied to the steel used on highway guards for corrosion protection?

A

Dipping cleaned steel in a bath of molten zinc

101
Q

What is the minimal surface preparation level for inorganic zinc?

A

SSPC- SP 10

102
Q

Where are coal tar epoxy systems used?

A

Mostly used in tank linings, underground piping, and piling.

103
Q

Inorganic zinc-rich systems have __________ high-temperature resistance.

A

Good

AMPP (4 decks)

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