Iron corrosion; anti-fouling and anti-corrosive paints . deposited, with atmospheric moisture, on the acid-proof painted surfaces of the bridge, whence it dropped on tothe tool in question. Among the plentiful instances of the rusting of ironstuctures by the action of smoke fumes, reference may bemade to that recorded in the Eevue Generah des Cltemins de Fer,June, 1893, p. 366. Again, there are various street bridges on the Swiss rail-ways which at present exhibit severe damage due to rustcorrosion. 22 lEON-COHEOSION AND ANTI-COEROSIVE PAINTS. District Engineer Ebert, of the Bavarian State Eai
Iron corrosion; anti-fouling and anti-corrosive paints . deposited, with atmospheric moisture, on the acid-proof painted surfaces of the bridge, whence it dropped on tothe tool in question. Among the plentiful instances of the rusting of ironstuctures by the action of smoke fumes, reference may bemade to that recorded in the Eevue Generah des Cltemins de Fer,June, 1893, p. 366. Again, there are various street bridges on the Swiss rail-ways which at present exhibit severe damage due to rustcorrosion. 22 lEON-COHEOSION AND ANTI-COEROSIVE PAINTS. District Engineer Ebert, of the Bavarian State Eailways,reports the subjoined interesting case :— The bridge in the Central Station at Munich and theCoppinger Strasse bridge at the Augsburg Station were botherected about the end of the sixties. The maintenance wasof the usual kind, the ordinary oil paint being renewed fromtime to time. No special care was exercised in the selectionof the paint or of the painters employed to lay it on, theinjurious influence of the gases and vapour given off from the. Pig. 5 (natural size).—Rust on rolled iron plate, produced in twelve hours bypouring water on to the plate and leaving it to dry. Rust flakes on cleanmetal. locomotives bemg then unknown. As in general, and espe-cially in the seventies, very little consideration was bestowedon the question whether the use of iron for bridge buildingis not only cheap but also advisable, in view of the specialconditions of maintenance exacted bj the situation andmethod of construction, so there was little fear expressedthat the smoke and steam given off by the engines would belikely to cause such an extent of damage as was actuallyfound to exist, in the Coppinger bridge in particular. Even IRON-CORROSION AND ANTI-CORROSIVE PAINTS. 23 in recent years when the question was posed at the invitationof the Bavarian State Railways, most of the railway managersdenied having encountered similar unfavourable the opinion then expressed
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