Development of Hexavalent Chromium-free Surface Treatment
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Accession number;05A0305029
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| Title;Development of Hexavalent Chromium-free Surface Treatment |
| Author;
TAKIKAWA KAZUNORI
(Honda R & D. Co., Ltd., Tochigi Labs.)
MIYADERA TSUTOMU
(Honda R & D. Co., Ltd., Tochigi Labs.)
OTSUKA TOSHIAKI
(Honda R & D. Co., Ltd., Tochigi Labs.)
SHIRAKAWA ATSUSHI
(Honda R & D. Co., Ltd., Tochigi Labs.)
TAKASHIMA MITSUO
(Honda R & D. Co., Ltd., Tochigi Labs.)
MATSUOKA YOJI
(Honda R & D. Co., Ltd., Tochigi Labs.)
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Journal Title;Honda R&D Tech Rev
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Journal Code:L0353A
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ISSN:0915-3918
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VOL.17;NO.1;PAGE.117-123(2005)
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| Figure&Table&Reference;FIG.19, TBL.1, REF.11 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;A hexavalent chromium-free surface treatment has been developed for automotive parts which provides a coating possessing equivalent anti-corrosion performance and friction characteristics to conventional chromate layers containing chromium (VI). The treatment forms a passivation layer of trivalent chromium and metallic chelates at the interface with the zinc, while uniformly covering the surface with a protective zinc layer. It is an unusual feature of this process that a single procedure is able to form a double layer. Optimization of the amount of silica added has enabled the achievement of friction characteristics equivalent to those of conventional chromium(VI) chromate layers. The new surface treatment has resulted in a reduction in the amount of hexavalent chromium used in the production process and present in finished parts. (author abst.) |
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