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#081 Corrosion Protection Measures - Corrosion Resistant Paints

Category : Corrosion - Corrosion Protection
June 3, 2011

Simply using the previously discussed corrosion resistant metals for structural materials in order to protect from corrosions will quickly become very expensive. Paints are used to protect from electrolytic and chemical corrosions by physically isolating the subject metals by surface coating with organic materials such as plastics.

Painting is applied on the subject metals by spraying, brushing, and roller coating. Subsequently, strong paint coats are formed by chemical polymerization of the ingredients. Some paints require 120 degrees C or higher temperature heating for the curing processes but natural curing paints are used for large structures such as steel beams, etc.

[Table 1] shows the general characteristics of corrosion resistant paints used in chemical plants and plating facilities.

[Table 1] General Characteristics of Paints
Resin
Type
Main
Appli
cation
Water Resist
ance
Acid Resist
ance
Alkali Resist
ance
Sulfur Dioxide Resist
ance
Solvent Resist
ance
Heat Resist
ance
Wea
ther Resist
ance
Alkyd
Resin
Steel Beams, Plates, General
Vinyl
Chloride
Steel, Concrete
AcrylicBuilding Exterior, Concrete
PhenolSteel Beams, Chemical Plants
Chlori
nated Rubber
Zinc
Plated Surfaces, Bridges, Steel Towers
Epoxy
Ester
Chemical Plants, Steel
Epoxy +
Amin
Chemical Plants, Steel
Tar +
Epoxy +
Amin
Water Proofing, Subme
rged Objects
×
Poly
iso
cyanate
Steel,
Pro
tection
of
Light Metals
Thermo-plastic AcrylicInterior Alu
minum, Steel Parts
Nitro
cellulose
Wood, Steel×
SiliconFor heat resist
ance
×
Note : Excellent, Good, OK, Not Applicable

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