研究改进了现行的钢铁件常温黑化工艺，通过极化曲线测试、耐蚀性测试、寿命测试得到了性能良好的常温亚硒酸体系黑化液。
A selenious acid type solution of better performance was obtained by the test of polarization curve, the test of corrosion resistance and the test of duration life.
研究改进了现行的钢铁件常温黑化工艺，通过极化曲线测试、耐蚀性测试、寿命测试得到了性能良好的常温亚硒酸体系黑化液。
A selenious acid type solution of better performance was obtained by the test of polarization curve, the test of corrosion resistance and the test of duration life.
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