INFLUENCE OF INSULATION DESIGN ON CONDENSATION AND CORROSION Available to Purchase

Cases of corrosion of metal coated on its inner surface with insulating materials are frequently encountered, particularly where the insulation has become damp. Since this problem first arose acutely, shortly after the introduction in this country of the first all‐steel railway carriages some 24 years ago, many attempts have been made to overcome the trouble. For a long time the mechanism of this kind of corrosion was in doubt. Some thought that the materials used, especially asbestos, were the prime cause. Various attempts were made to use non‐absorbent insulants or to waterproof the visible face of the insulation with a film of bitumen or the like.