Overview: The Potential of silanes for chromate replacement in metal finishing industries |
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Authors: | Wim J van Ooij Danqing Zhu Vignesh Palanivel J Anna Lamar Matthew Stacy |
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Institution: | (1) Department of Materials Science and Engineering, University of Cincinnati, Ohio, 45221-0012 |
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Abstract: | Trialkoxysilanes (or silanes) have emerged as a very promising alternative for chromates in metal finishing industries. Compared to the conventional chromating processes, the major merits of silane-based surface treatments include: eco-compliance, easy-control processing, comparable corrosion protection of metals as well as paint adhesion to a variety of topcoats. In this overview paper, we report the recent status of silane studies including results of corrosion performance tests, the mechanism of corrosion protection of metals by silanes and the themal stabilities of silane films. We also address the new fields that we are beginning to explore such as nano-structured silane films, “self-healing” silane films, and “super-primers”. |
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Keywords: | silanes coupling agents corrosion primics adhesion metal coatings |
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