Iron corrosion; anti-fouling and anti-corrosive paints . Fig. iJ (natural size).. Fig. 50 (magnified).—Blisters and cracks caused by heating a layer of oil paint. also occur, though more slowly, at lower temperatures—stillabove the ordinary hmit. At 120 C. the film very soonbecomes brittle like glass. 102 IRON-CORROSION AND ANTI-CORROSIVE PAINTS. The conclusioD drawn from these results is that: Allpaints suffer loss in weight in the warm, and contract,thereby losing their soft caoutchouc-like nature, and be-coming stiff and brittle. So long as the film of paint remainsattached to its substratu
Iron corrosion; anti-fouling and anti-corrosive paints . Fig. iJ (natural size).. Fig. 50 (magnified).—Blisters and cracks caused by heating a layer of oil paint. also occur, though more slowly, at lower temperatures—stillabove the ordinary hmit. At 120 C. the film very soonbecomes brittle like glass. 102 IRON-CORROSION AND ANTI-CORROSIVE PAINTS. The conclusioD drawn from these results is that: Allpaints suffer loss in weight in the warm, and contract,thereby losing their soft caoutchouc-like nature, and be-coming stiff and brittle. So long as the film of paint remainsattached to its substratum (iron) it cannot shrink, and acertain tension is therefore set up between the paint andthe iron. The degree of tension increases with the increaseof temperature and duration of exposure—especially in directsunlight—and as the coating becomes at the same time moreand more brittle it must finally tear, the result being theproduction of so-called air-cracks. These can be seen on allold paint, especially in paints on iron, and they intersect theentire surface like a netw
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