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Powdered metals and structural metals having improved resistance to heat and corrosive fluids and b-stage powders for making such powdered metals
Powdered metals and structural metals having improved resistance to heat and corrosive fluids and b-stage powders for making such powdered metals
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机译:具有改善的耐热和腐蚀性流体抵抗力的粉末金属和结构金属以及用于制造此类粉末金属的b级粉末
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摘要
Improved resin-bonded powdered metal components are protected against corrosion and reduction of crush strength during contact with corrosive fluids such as alcohols, ethanol-containing fuels, glycols and peroxide-containing fuels by a resin system coating that, when cured, provides a relatively high crosslink density and relatively few hydrolysable radicals. Magnetic properties of resin-bonded powdered metal magnets are protected from heat degradation by the cured resin coating. The coating can be a heat-cured resin system comprising a phenol novolac resin and a compatible hardener. In one embodiment magnetizable powdered materials have an uncured resin system coating to provide a B-stage material that can be cured after compression shaping.
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