Iron corrosion; anti-fouling and anti-corrosive paints . iate forma-tion of rust. bubbles, which can be loosened by touching them and willthen leave the rusty surface of the metal exposed. That, asis asserted by the opponents of the practice of bottomingiron with linseed oil or Iniseed varnish, this treatment con-tributes to the formation of l)listers the author would deny,since he has been unable to detect any such blistering ; andhe believes rather that it only occurs when the sun hasacted direct and continuously, for a fairly long time, uponthe paint. lEON-COBEOSION AND AXTI-CORROSIVE PAINT
Iron corrosion; anti-fouling and anti-corrosive paints . iate forma-tion of rust. bubbles, which can be loosened by touching them and willthen leave the rusty surface of the metal exposed. That, asis asserted by the opponents of the practice of bottomingiron with linseed oil or Iniseed varnish, this treatment con-tributes to the formation of l)listers the author would deny,since he has been unable to detect any such blistering ; andhe believes rather that it only occurs when the sun hasacted direct and continuously, for a fairly long time, uponthe paint. lEON-COBEOSION AND AXTI-CORROSIVE PAINTS. 91 Highly inimical to oil paint on iron is the presence ofintermediate layers of other paints. It seems hardly likelythat any one would apply a coating of size paint over oilpaint; nevertheless, such a thing is possible, and, owing tothe modern tendency to effect economies by the use of cheapmaterials, is an instance that might occur. Figs. 41 and 42 illustrate the condition into which a coatof oil paint may fall when a bottom coat of red lead paint. Pig. 44 (magnified).—Effect of water on wet paint, with immediate formation of rust. has been covered with a layer of size paint, and this againtopped by a coat of red lead paint. From considerations ofeconomy wood is frequently painted over with a coatingof size paint before the oil colour is laid on. Just as in the case of a first coat on iron, the subsequentlayers of paint must only he laid on when tJie surface is jicifectlyfree from water and moisture, and must be equally protected fromwater and rain. The effect of a layer of water upon a per-fectly fresh coat of paint can be seen from Figs. 43 and 44. 92 mON-COREOSION AND ANTI-COEEOSIVB PAINTS. Here the fresh surface of the paint was suffused with water,whereupon a portion of the paint coUected on the surfaceof the water and ran off, whilst the rest remained on theiron, but no longer as a coherent stratum, part of the ironsurface being laid bare. Partial contraction of th
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcorrosionandanticorr
