Coating Material for Protecting Metals, Especially Steel, From Corrosion and/or Scaling, Method for Coating Metals and Metal Element
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United States of America Patent
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Issued Date -
Apr 22, 2010
app pub date -
Dec 7, 2006
filing date -
Dec 12, 2005
priority date (Note) -
Abandoned
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Abstract
The invention relates to a coating material for protecting metals, especially steel, from corrosion and/or scaling, to a method for coating metals and to a metal element. The aim of the invention is to provide a coating material that protects steel from corrosion and/or scaling and that can be welded after heat treatment of the coated steel at temperatures of more than 800° C. For this purpose, substances are provided that render the applied coating material suitable for welding, especially for spot welding. The coating material can be applied by wet chemical methods, it changes its structure when subjected to high temperature processes of more than 600° C. and is suitable as a primer for additional coating materials. It was surprisingly found that when a suitable binder including a suitable filler is used during the high temperature treatment of a curing process, the coating materials of the invention change in such a manner that electrically conducting reactive layers are formed that allow welding and especially spot welding together with the metal substrate even after treatment at temperatures of more than 800° C.
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