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Corrosion under insulants

  • Mathematics


Metal structures covered with insulants are thereby hidden from view and so any ensuing corrosion, such as general attack upon a low-alloy steel or stress-corrosion cracking of a stainless steel, may remain undetected until catastrophic failure occurs. It is, therefore, of the utmost importance that the potential for, and the enhancement of, corrosion due to the addition of insulants should be carefully considered. The ingress of water or water vapour into the insulant layer is the major cause of corrosion, and it is essential that steps are taken to prevent or reduce the likelihood of this occurring while ensuring that metal surfaces are adequately protected.

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