Iron corrosion; anti-fouling and anti-corrosive paints . ).—Rust on rolled sheet iron, scoured with pumice; pro-duced by falling drops of water constantly evaporated. have been broken off clean, and exhibited, both externallyand internally, a thick incrustation of rust, the sound coreof metal being not more than %iVT5 inch in thickness. Another peculiar instance of the decomposition of ironwas carefully investigated by Otto Herting. Here an oldiron rail, a T-shaped girder, was found at Cape Breton in amine which had been abandoned for about twenty metal had a specific gravity of only
Iron corrosion; anti-fouling and anti-corrosive paints . ).—Rust on rolled sheet iron, scoured with pumice; pro-duced by falling drops of water constantly evaporated. have been broken off clean, and exhibited, both externallyand internally, a thick incrustation of rust, the sound coreof metal being not more than %iVT5 inch in thickness. Another peculiar instance of the decomposition of ironwas carefully investigated by Otto Herting. Here an oldiron rail, a T-shaped girder, was found at Cape Breton in amine which had been abandoned for about twenty metal had a specific gravity of only , was greyish-brown in colour, could be cut and shaved with a knife, and IRON-CORROSION AND ANTI-COREOSIVE PAINTS. 19 powdered in a mortar, the powder being magnetic. Analysisfurnished the following interesting result:— Silicon 14-20 Carbon (graphitic) 24-10 Phospliorus ........ 5-85 Sulphur 1-00 Manganese 1-93 Iron 31-50 It is thus evident that the film of iron silicate, known tobe first formed when iron is left to lie in the ground, was in-. FiG. 2 (magnified).—Rust on rolled sheet iron, scoured with pumice ; producedby falling drops of water constantly evaporated. capable of preventing the destruction of the rail in question,and therefore cannot be regarded as an efficient protectivecoating for this metal. As Professor L. von Tetmayr has adequately shown, theinfluence of smoke fumes on iron has not been sufhcientlyregarded up to the present time, for we can see every dayarticles or objects that have, from the outset, been exposedto a strong acid corrosion without being protected frompremature destruction by any smoke shield or the application 20 mON-COEROSION AND ANTI-CORROSIVE PAINTS. of some suitable paint. Through a better appreciation ofthe state of affairs the system of construction employed inunfavourable cases in Bavaria of late is such that the iron-work is almost entirely enclosed in cement concrete, which
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcorrosionandanticorr
