San Francisco : Architect and Engineer, Inc · leaf 81
extent of pollution of theatmosphere, and (3) The chemical composition ofthe iron and steel. Certain alloying elements pro-mote the formation of a more dense, adherent and,hence, protective rust, which retards further attack.Thus steel containing 0.1-0.2 per cent copper hasits atmospheric corrosion… … tion looking to tl-ie improvement of methods andfacilities to prevent and reduce rust. Meanwhile, investigatory work goes forward. The National Association of Corrosion Engi-neers, for instance, has set up a technical com-mittee the objective of which is to collect specificinformation about the…
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