低温镀铁层显微组织的分析  

Analysis on Micro-structure of Low-temperature Iron Plating Coatings

作　　者：杨森[1] 孙凯[1] 邓汉忠[1] 

机构地区：[1]辽宁工程技术大学矿业技术学院,辽宁葫芦岛125105

出　　处：《电镀与环保》2015年第6期1-4,共4页Electroplating & Pollution Control

摘　　要：为了优化低温镀铁工艺并开展深入的理论研究,利用扫描电镜对镀铁层的表面形貌、断面形貌和微裂纹形貌进行了观察。结果表明:pH值较低时,析氢导致镀铁层内产生微裂纹或腐蚀坑;pH值较高时,形成Fe(OH)_3并夹杂在镀铁层中,造成镀铁层表面疏松、粗糙。析氢是导致镀铁层表面产生微裂纹的根本原因,镀铁层表面应力加速微裂纹的产生和扩展。当pH值为1.0时,微裂纹较少,镀铁层组织致密,与基体结合较好。In order to optimize low-temperature iron plating technology and then carry out indepth theoretical study, the surface morphology, fracture surface morphology and micro-crack morphology of iron plating coatings were observed by scanning electron microscope. Results showed that hydrogen evolution lead to the appearance of micro-cracks or corrosion pits at lower pH value, while Fe（OH）3 formation and mingled in iron plating coatings at higher pH value resulting in loose and rough surface morphology. Hydrogen evolution is the essential reason for appearance of micro-cracks in iron plating coatings. Moreover, surface stress accelerated the formation and propagation of micro-cracks. When pH value is 1. 0, the obtained iron plating coatings featuring less micro-cracks and compact structure, and was combined closely with the substrate.

关 键 词：低温镀铁层 表面形貌 断面形貌 微裂纹形貌 

分 类 号：TQ153[化学工程—电化学工业]