采用载波钝化法在硫酸溶液中获得了不锈钢的彩色钝化膜,探讨了所载方波的参数对着色的影响。结果表明:载波钝化所载方波的各参数(频率、占空比和高、低电位幅值)对着色膜厚度的影响都有一定的规律。运用极化曲线对方波各参数的影响作了初步分析,以便提高着色工艺并为进一步研究着色机理提供实验数据。
A thick passive film showing interference colors has been obtained in sulfuric acid solution without Cr6+ ion with A. V. modulated passivation method. The effects of various electric parameters of the A. V. passivation, such as frequency, ratio of time t+/(t- +t+) and the top or the botten potentials, on the growth of colored film have been examined and interpretted. The experimental conditions were optimized. Finally, the growth of colored film under the applied potential was discussed.
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