ISO 12944-5: Paints and varnishes - Corrosion protection of by ISO TC 35/SC 14/WG 5

By ISO TC 35/SC 14/WG 5

This a part of ISO 12944 describes the categories of paint and paint process general for corrosion safety of metal buildings. It additionally offers tips for the choice of paint structures on hand for various environments (see ISO 12944-2) and diverse floor practise grades (see ISO 12944-4), and the sturdiness grade to be anticipated (see ISO 12944-1). the sturdiness of paint structures is classed by way of low, medium and excessive.

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Additional info for ISO 12944-5: Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 5: Protective paint systems

Example text

1 — VOC contents of different generic paint types Typical VOC range g/litre Water-borne alternative available? High-solids alternative available? Solvent-free alternative a available? Poly(vinyl chloride) copolymer > 500 YES NO NO Chlorinated rubber > 500 NO NO NO Acrylic > 500 YES NO NO Alkyd 330 to 500 YES YES NO Polyurethane (aromatic) 0 to 500 YES YES YES Polyurethane (aliphatic) 0 to 500 YES YES YES Epoxy 0 to 700 YES YES YES 350 to 650 YES YES NO Generic type of paint Zinc silicate a NOTE 2 100 % solids/no volatile content.

NOTE 1 For Europe, an organic compound is considered to be a VOC if, at a temperature of 293,15 K, it has a vapour pressure of 0,01 kPa or more. For the USA, the conditions are not specified, but those organic compounds which are regarded as VOCs are identified as such. VOCs are considered as air pollutants and most participate in photo-chemical reactions. For this reason, manufacturers have been obliged to reduce the amounts of VOCs in paints to acceptable levels to minimize the air pollution.

1 indicates the VOC contents of different generic paint types and the possibilities for reduction. 1 — VOC contents of different generic paint types Typical VOC range g/litre Water-borne alternative available? High-solids alternative available? Solvent-free alternative a available? Poly(vinyl chloride) copolymer > 500 YES NO NO Chlorinated rubber > 500 NO NO NO Acrylic > 500 YES NO NO Alkyd 330 to 500 YES YES NO Polyurethane (aromatic) 0 to 500 YES YES YES Polyurethane (aliphatic) 0 to 500 YES YES YES Epoxy 0 to 700 YES YES YES 350 to 650 YES YES NO Generic type of paint Zinc silicate a NOTE 2 100 % solids/no volatile content.

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