Iron corrosion; anti-fouling and anti-corrosive paints . n plate by fourteen daysexposure to atmospheric influences. rivet is entirely eaten away with rust, and thus loses its holdand power of binding the parts together. If, now, the samething happens in a large number of the rivets, then thestability of the structure is rendered questionable and acci-dents of the worst kind may ensue. Eust is an unwelcome visitor in all iron articles, but inthe case of iron structures, and especially bridges, is adangerous foe, and one that should be combated by everyavailable means. The manner in which this
Iron corrosion; anti-fouling and anti-corrosive paints . n plate by fourteen daysexposure to atmospheric influences. rivet is entirely eaten away with rust, and thus loses its holdand power of binding the parts together. If, now, the samething happens in a large number of the rivets, then thestability of the structure is rendered questionable and acci-dents of the worst kind may ensue. Eust is an unwelcome visitor in all iron articles, but inthe case of iron structures, and especially bridges, is adangerous foe, and one that should be combated by everyavailable means. The manner in which this can be most IRON-CORROSION AND ANTI-CORROSIVE PAINTS. 39 effectually done will be thoroughly discussed in a latersection dealing with the prevention of rust by paint. Already, in preceding pages, a number of photographicreproductions of rusted iron plate and a few other objectswill have been noticed, and to these comes a further seriesrequiring but a few words of elucidation. As is well known,red colours, such as that of rust, come out dark when photo-. FiG. 23 (natural size).—Rust produced on iron plate through ordinary wearand condensed moisture. graphed ; but, as the result of experiments with variousmethods of illumination of the iron plates here reproduced,it was found possible to obtain all the rust spots as more orless light tones, so that perfectly white spots indicate astrong forixiation of rust, darker tones showing less intenserusting, and the clean metal darkest of all. Another im-portant result, however, sprang from these researches, and 40 IBON-COHEOSION AND ANTI-COEBOSIVB PAINTS. that is, that by means of the method of illmnination andreproduction employed it becomes possible to reveal specksof rust undiscernible by the naked eye, or even by the aid ofa hand glass, a circumstance which may find still furtherpractical utilisation. When the forms in which rust makes its appearance areexamined they will be recognised as varying in characterThus, if a drop of water
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcorrosionandanticorr
