Coating Types Flashcards
Excellent UV and weathering resistance
Can be applied as coalescence curing
Historically applied as decorative coatings rather than for corrosion resistance
A. Allkyds
B. Acrylic
C. Epoxy
D. Chlorinated Rubber
Acrylic
Oxidative curing Referred to as "oil based paints" Advantages: -Single package material -Broad range of colors
Disadvantages:
- Can be very slow to cure
- Limited thickness per coat
A. Allkyds
B. Acrylic
C. Epoxy
D. Chlorinated Rubber
Allkyds
Evaporation curing
Contains a large amount of VOC
Eliminated in most parts of the world
Excellent resistance to water, sunlight, and many chemicals
A. Allkyds
B. Acrylic
C. Epoxy
D. Chlorinated Rubber
Chlorinated Rubber
Two components consist of an epoxy resin (base) and a curing agent (converter)
Can be solvent-based, water-based, or solvent-free
Excellent adhesion, chemical resistance, water resistance, and wet adhesion
Amine cured epoxies are especially sensitive to amine blush
Exhibit chalking with atmosperic UV exposure
A. Allkyds
B. Acrylic
C. Epoxy
D. Chlorinated Rubber
Epoxy
Resins, made from organic materials
Have a broad range of chemical resistance
Blended with cement to form a trowelable mortar
Applied by bricklayers, not coating applicators
Not a common coating type
A. Polyaspartic
B. Phenolic
C. Latex (Emulsions)
D. Furans
Furans
Resins normally thermoplastic resin types
Coalescence curing
A. Polyaspartic
B. Phenolic
C. Latex (Emulsions)
D. Furans
Latex (Emulsions)
Typically used where low pH environments and higher temperatures are factors
Excellent resistance to acids
A. Polyaspartic
B. Phenolic
C. Latex (Emulsions)
D. Furans
Phenolic
Used to achieve low or near-zero VOC systems
Pot life from 5 minutes to several hours
Film builds up to 380um (15 mils) DFT in a single pass
A. Polyaspartic
B. Phenolic
C. Latex (Emulsions)
D. Furans
Polyaspartic
Have a short pot life
Glass flake reinforced, high buyild coatings
Excellent moisture resistance
Exceptionally high abrasion resistance
A. Polyurethane
B. Polysiloxanes
C. Polyesters
D. Polyureas
Polyesters
Used in services with abration, chemicals, extreame UV, and high temperature
A. Polyurethane
B. Polysiloxanes
C. Polyesters
D. Polyureas
Polysiloxanes
Two major types:
- Aliphatic
- More resistant to UV exposure
- Aromatic
- Better chemical resistance in immersion
- Excellent gloss
Main hazard is the isocyanate component
Available with a variety of curing times
A. Polyurethane
B. Polysiloxanes
C. Polyesters
D. Polyureas
Polyurethane
Very flexible materials
Very short cure times
Many require the used of an epoxy primer on steel
A. Polyurethane
B. Polysiloxanes
C. Polyesters
D. Polyureas
Polyureas
Formed by chemical modification of quartz, sand, or silicon
Excellent high temperature and UV resistance
Most require heat to cure by some cure at ambient temperatures
Also used as foul-release coatings in the marine industry
A. Vinyl Esters
B. Silicones
C. Vinyls
D. Allkyd
Silicones
Often referred to as linings
Normally two-component coatings
Have rather short pot life
Excellent abrasion resistance with glass glake added
A. Vinyl Esters
B. Silicones
C. Vinyls
D. Allkyd
Vinyl Esters
One of the earliest industrial coatings
Were used on highway bridges and extensively in the marine industry
Banned from use in most countries due to high VOC
A. Vinyl Esters
B. Silicones
C. Vinyls
D. Allkyd
Vinyls
