| 摘要 |
<p>Steel sheet, used in the electrical industry, is provided with a coating by a liquid contg. a dispersion of fine particles, the liquid being obtd. by adding a resin emulsion, which will precipitate agglomerated particles of 3-40 mu dia., to an aq. soln. contg. chromic acid and a compatible resin. The resin emulsion is added in an amt. so that the total quantity of non-volatile constituents of the two resins is 50-150 p.b.w. referred to 100 p.b.w. CrO3, and the amt. of non-volatiles of the resin, which will precipitate agglomerated particles, is >=1 p.b.w. of the total and at least 5 wt. % referred to the total non-volatiles of the two resins. The coating is baked at 300-700 degrees C. The coated sheet has superior stampability and weldability, as well as excellent insulation resistance.</p> |
