Corrosion Barriers for Thermally Insulated Stainless Steels (OGCP ref CP 4.4)

Pitting and stress corrosion can result from moist thermal insulation where chlorides are present. This information sheet provides background information on the sources of chlorides within such insulation materials and describes two corrosion prevention methods. Paints (e.g. a high temperature silicone type) or 0.06 mm thick aluminium foil can be used as barriers between insulation layers and stainless steel. BS5970, BS5422 are cited in this information sheet.

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