OALib Journal期刊
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基体表面粗糙度对h13钢板表面镀铬层的影响
Keywords: 金属材料,?h13钢,?电镀铬,?粗糙度,?腐蚀电化学
Abstract:
?分析测试h13钢表面镀铬层的表面形貌与结构、粗糙度、显微硬度、厚度、电化学阻抗及极化曲线,研究了h13钢基体表面粗糙度ra对其表面镀铬层结构与性能的影响。结果表明:电镀时间小于30min时,随着ra$的增加,镀铬层晶粒尺寸减小,堆积趋于稀疏;电镀30min后,不同ra的镀铬层晶粒尺寸及分布基本相同;电镀60min后,随着ra的增加,镀铬层晶粒的尺寸明显增大;当ra值小于0.504?μm时,(200)面为铬晶粒的优势生长面,当ra值为0.504?μm时,(211)面为铬晶粒的优势生长面;随电镀时间的增加,镀铬层的厚度和显微硬度逐渐增大;当电镀时间相同时,随着ra的减少,镀铬层的厚度减少,显微硬度增加,镀铬层的耐蚀性逐渐提高。
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