Iron corrosion; anti-fouling and anti-corrosive paints . FiGS. 32 and 33—Rust pittingg iu tinned sheet iron after ten years storage in a cellar. named patches the formation exhibited the decided charac-teristics of rust in general, especially in view of the relativeshortness of the exposure, and the incrustation was more 48 IRON-CORROSION AND ANTI-COBROSIVE PAINTS. intense than that exhibited by the twenty-four hoars reactionof hydrochloric acid. A number of somewhat considerablerust warts of varying colour and thickness were formed. Inthis case in particular the photographs afford a decided p
Iron corrosion; anti-fouling and anti-corrosive paints . FiGS. 32 and 33—Rust pittingg iu tinned sheet iron after ten years storage in a cellar. named patches the formation exhibited the decided charac-teristics of rust in general, especially in view of the relativeshortness of the exposure, and the incrustation was more 48 IRON-CORROSION AND ANTI-COBROSIVE PAINTS. intense than that exhibited by the twenty-four hoars reactionof hydrochloric acid. A number of somewhat considerablerust warts of varying colour and thickness were formed. Inthis case in particular the photographs afford a decided proofof the damage that may be occasioned to iron by the actionof atmospheric influences, and it is really incomprehensiblethat iron articles should be — as they frequently are — leftlying exposed to the open air for weeks and months withoutany Fig. 84 (natural size).—Rolled sheet iron scoured with pumice and exposedfor five minutes to the action of concentrated hydrochloric acid. Theholes have been eaten away by rust. The progressive development of rusting naturally leadsto much more pernicious consequences in the comparativelythin sheet iron than in more massive castings. The former,indeed, when once actually attacked by rust, is entirely cor-roded in a comparatively short space of time, , the rustcontinues to extend and attacks fresh, hitherto sound, por-tions of the metal, which finally is so far permeated therebythat it becomes brittle, falls in holes, and at last crumbles IRON-CORROSION AND ANTI-CORROSIVE PAINTS. 49 away altogether. An advanced stage of rusting is shown inFig. 23. The rust forms thick layers — removable in theform of rust-brown powder when scraped with a knife—onthe surface of the iron, which still retains some of its strength,though it will break if bent several times in the one
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcorrosionandanticorr
