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color and coatings > Paint > Flashcards

Paint Flashcards

1
Q

To ensure a dry surface, the temperature of the surface must be ?

A
  • 5°F above the dew point temperature.
  • If the temperature of the surface to be painted is at or below the dew point temperature, condensation may blister the paint film.
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2
Q

During winter, spring, and fall, the combination of short days and extreme weather conditions limit available time for paint application.

A
  • Delay the start of painting in the day until dew and frost have disappeared and the temperature of the surface is 5°F above the dew point.
  • The painting must be further shortened by stopping the work at least two hours before the temperature of the surface is expected to drop below the dew point.
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3
Q

Safety. When ordering paints and related supplies, always request ?

A

the Material Safety Data Sheet (MSDS)/Safety Data Sheet (SDS)

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4
Q

Preparation of Ungalvanized Steel.

A
  • Metallic surfaces other than aluminum and
    galvanized steel are best cleaned by dry blasting methods.
  • Wet blasting shall be used where dry blasting is impracticable.
  • Water jetting may be used to prepare ungalvanized steel surfaces.
  • Steel wool should not be used as a substitute for sandpaper since small steel particles become embedded in the paint and form a source of corrosion
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5
Q

Preparation of Galvanized Steel.

A
  • Avoid heavy blast cleaning of galvanized steel
  • Chipping hammers shall not be used on galvanized surfaces
  • Old paint is normally removed by means of a hand scraper and/or hand or power wire brushes if blast-cleaning equipment is not available.
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6
Q

Preparation of Aluminum.

A
  • Light brush blasting or power sanding to provide a 1.5 mil anchor pattern will promote paint adhesion on smooth surfaces.
  • Use garnet or aluminum oxide blasting materials/abrasive paper with no metallic content
  • Do not use steel shot, steel grit, copper slag, or any coal/boiler slag abrasives such as Black Beauty that contain iron or copper because they can contaminate
    the aluminum surface.
  • The most effective method for aluminum preparation presuming an anchor pattern was previously established on the substrate is waterjetting combined with a recovery system.
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7
Q

Epoxy. Epoxy vehicles are made up of two components that are premixed before use:

A
  • an epoxy resin and a polyamide hardener.
  • Anything left at the end of the day must be discarded.
  • Epoxy paints tend to chalk on exterior exposure so that low gloss levels and fading can be anticipated; otherwise, their durability is excellent
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8
Q

Latex. Latex paints are based on water emulsions of three basic types of polymers:

A

polyvinyl acetate, polyacrylic, and polystyrene-butadiene. They dry by evaporation of water,

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9
Q

Oil. Linseed oil is the major vehicle in oil house paints.

A

These paints are the oldest type of coatings in use and have the longest history of performance.

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10
Q

Paint Conditioning and Mixing.

A
  • All paint
    materials should be placed in the paint shop at least 24 hours before use in order to bring their
    temperatures between 65oF and 85oF.
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11
Q

Boxing. Boxing is a mixing procedure where a material is

A

repeatedly poured back and forth between two containers.

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12
Q

what are the brush components:

A

Handle- used to fit the hand
Setting- used to hold the bristles
ferrule- used to construct the handle and stock so it wont come apart.
Stock- bristles

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13
Q

Oval and Semi-Oval Paint and Varnish Brushes.

A

The semi-oval is used for fine painting and varnishing

work.

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14
Q

The wrist and arm motions should be free, easy, and not forced. Hold the brush firmly with fingers.

A
  • In holding the brush, the fingers should not go beyond the metal ferrule onto the bristles.
  • ## When painting, dip only half the bristles into the paint.
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15
Q

Roller Cover Materials.

A

“Nap” is the thickness of the cover and generally

  • a thin nap is used on smooth surfaces
  • thick nap is used on rough surfaces
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16
Q

Mohair.

A

This type cover is recommended for applying enamels to smooth surfaces.

17
Q

in order to spray paint the temp outside shall ?

A
  • It normally requires an air temperature of
    40 F 70 F at least for proper atomization; is optimum.
  • In general, hold the spray gun 6 to 8 inches away from the surface being painted
18
Q

Flatting. Glossy paints lose their gloss and eventually turn flat with age.

A

This is a sign of initial breakdown of the vehicle at the surface of the paint. Chalking soon follows loss of
gloss.

19
Q
  • Checking is described as tiny breaks that take place only in the upper coat or coats of the paint film without penetrating to the substrate.
  • Checking arises from stresses within the paint film.
A

Cracking describes larger and longer breaks that extend through to the substrate. Both are a result of stresses in the paint film which exceed the strength of the coating.
- Cracking, on the other hand, is caused by stresses between the film and the substrate. Cracking
will generally take place to a greater extent on wood than on other substrates because of greater
expansion.

20
Q

Crawling.

A

Crawling occurs when the new coating fails to wet and form a continuous film over the preceding coat.

21
Q

Oily rags shall not be stored in paint storage cabinets; they shall be stored in metal containers with self-closing lids.

A
  • Oils dry by oxidation and produce heat that can lead to spontaneous combustion.
  • If this heat cannot escape, it accumulates to the point of igniting the organic materials and results in fire.
22
Q

Storage Cabinet Specs

A
  • bottom, top, door, and sides of the cabinet are
    constructed of at least No. 18 gauge steel
  • double walled and floored with a 1-1/2
    inch air space between inner and outer surfaces.
  • doorsill is raised at least 2 inches above the inner bottom surface of the cabinet. Cabinets should be painted yellow
  • the words, FLAMMABLE – KEEP FIRE AWAY,
23
Q

Maximum Quantity.

A

Sixty (60) gallons of flammable products and one hundred and twenty (120) gallons of combustible products are the maximum quantity allowed to be
stored in any one cabinet.
- Not more than three such cabinets may be placed in any work center or room

24
Q

A

“confined space” is defined as a space that:

A
  • is it large enough for someone to enter and perform work
  • has a limited or restricted means for entry or exit
  • is not designed for living occupancy
25
Q

Fire and Explosion Hazards.

A

Sufficient ventilation shall be provided to keep concentrations of vapors below ten (10) percent of the lower explosive limit.

26
Q

Lead.

A

Paints shall contain no more than 0.009% lead by weight

27
Q

VOC limits for anti fouling paint

A

400 grams and reduced to 340 in future

28
Q

Paint storage life for two part epoxy?

water based and oil based?

A
  • ambient temps can remain functional for up to 10 yrs, opened up and unmixed can be stored for 3-4 yrs
  • WB and OB for up to 3-5 yrs, not suitable if opened and stored more than a yr.
29
Q

Interior Surfaces.

A

Interior repainting shall normally not be required
more often than once every three years. The minimum number of coats required for
hiding a surface should be applied. One coat is usually sufficient.

30
Q

Hull Exterior and Superstructure Surfaces

A

Exterior surfaces should be repainted prior to
failure of the paint film. Exterior steel surfaces on cutters and boats above the main deck shall not normally be top coated more often than every two years.
- Exteriors of hulls above the boot-topping should not normally be top coated more often than every year.

31
Q

helmet color meanings:

A 
White = Safety supervisor
yellow = deck supervisor
green- break in
Brown = crane operator
red = line throw gunner
Blue = rigger
orange supply
gray = deck workers
32
Q

The detachable link between
shots, excluding the detachable link for the 5 fathom connecting section, will be painted
in the following pattern

A
  • 15 fathom, first shot detachable link, red (11105)
  • Additionally, the first link on each side of the 15 fathom detachable link shall be painted white
  • The first link at each side of the detachable link shall also be marked by one turn of wire around the stud.
  • 30 fathom, second shot detachable link, white (17925)
  • 45 fathom, third shot detachable link, blue (15182)
33
Q

The same pattern of marking detachable links shall be continued up to the next to last
inboard shot.

A

All of the links in the next to last inboard shot shall be painted yellow (13538), and all of the links in the last inboard shot shall be painted red (11105).

34
Q

Ordnance Equipment.

A
  • Interior and exterior surfaces of enclosed gun mount shields are to be painted white
  • The interior gun mechanism and equipment shall be painted gray
  • Gun barrels shall be painted black
  • All open gun mounts and mortars shall be painted black

color and coatings (1 decks)

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