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材料研究学报  2010, Vol. 24 Issue (5): 455-463    
  研究论文 本期目录 | 过刊浏览 |
基体表面粗糙度对H13钢板表面镀铬层的影响
李振华, 盛敏奇, 钟庆东, 王毅, 吴红艳, 杜海龙
上海大学上海市现代冶金与材料制备重点实验室 上海 200072
Influence of Surface Roughness of Matrix on Chromium Coatings on the Surface of H13 Steel
LI Zhenhua, SHENG Minqi, ZHONG Qingdong, WANG Yi, WU Hongyan, DU Hailong
Key Laboratory of Modern Metallurgy and Material Processing, Shanghai University, Shanghai 200072
引用本文:

李振华 盛敏奇 钟庆东 王毅 吴红艳 杜海龙. 基体表面粗糙度对H13钢板表面镀铬层的影响[J]. 材料研究学报, 2010, 24(5): 455-463.
, , , , , . Influence of Surface Roughness of Matrix on Chromium Coatings on the Surface of H13 Steel[J]. Chin J Mater Res, 2010, 24(5): 455-463.

全文: PDF(1333 KB)  
摘要: 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30 min时, 随着Ra$的增加, 镀铬层晶粒尺寸减小, 堆积趋于稀疏; 电镀30 min后, 不同Ra的镀铬层晶粒尺寸及分布基本相同; 电镀60 min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。
关键词 金属材料  H13钢  电镀铬  粗糙度  腐蚀电化学    
Abstract:The effect of surface roughness of H13 steel on chromium coatings’ structure and properties was investigated by surface morphology and structure analysis, electrochemical impedance and polarization curve testing. The results show that when the electrodepositing time is less than 30 min, with the increase of the surface roughness of steel matrix, the grain size of chromium coatings decreases, and the grain accumulation becomes sparse; when the electrodepositing time is 30 min, the grain size and distribution of chromium coatings obtained under different surface roughness are same; when the time is more than 30 min, with the increase of the surface roughness, the grain size of chromium coatings increases obviously. When the surface roughness value Ra is less than 0.504 μm, the advantage growth surface of chromium grain is (200), and when Ra was 0.504 μm, the advantage growth surface of chromium grain changes to (211); the thickness and the microhardness of chromium coatings increase with the increase of electrodepositing time; with the reduce of surface roughness at a same electrodepositing time, the thickness of chromium coatings decrease, the microhardness increases, and the corrosion resistance of chromium coatings gradually increases.
Key wordsmetallic materials     H13 steel     electrodepositing chromium     surface roughness     corrosion electrochemistry
收稿日期: 2010-06-30     
ZTFLH: 

TB304

 
基金资助:

国家自然科学基金50571059, 50615024教育部新世纪优秀人才支持计划NCET--07--0536, 教育部创新团队计划IRT0739资助项目。

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