| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.10 ( December1984 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Rust Stabilizing Surface Treatment for Atmospheric Corrosion-Resistant Steel (RS-COAT) Tsukasa Imazu, Takao Kurisu, Yoichi Nakai, Tadakazu Kyuno, Masao Ishiwata, Tadaaki Sato |
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Synopsis : It is well-known that atmospheric corrosion resistant steel gives beautiful rust appearance, which has been formed during long period exposure. In initial exposure, however, its rust sometimes pollutes surrounding structures, flies itself in all directions and gives uneven appearance. RS-COAT has been developed to improve the above-mentioned weak points for the purpose of increasing the maintenance-free period of atmospheric corrosion resistant steel. On the basis of the investigation by coating and long period exposure tests, it is found that RS-COAT has the following beneficial characteristics. (1) Controlling corrosion rate at a low level as a result of moderately supplying such corrosive agents as O2 or H2O to steel surface. (2) Preventing the outflow of Fe ion. (3) Keeping a fairly good appearance until the rust has been stabilized. (4) Acting as barrier and trapping layer against such corrosive agents as Cl~ or SOx. (5) Economical one coating process. RS-COAT has successfully been used for such structures as roofs, bridges and walls. |
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