Li Jipeng,Yao Ying*,Liu Xiaohua,et al.Study on black spot defect of chromium-free fingerprint-resistant hot-dip aluminized zinc steel plate[J].Plating & Finishing,2024,(2):87-91.[doi:10.3969/j.issn.1001-3849.2024.02.012]
无铬耐指纹热镀铝锌钢板黑斑缺陷研究
- Title:
- Study on black spot defect of chromium-free fingerprint-resistant hot-dip aluminized zinc steel plate
- Keywords:
- hot-dip aluminized zinc ; black spot ; micro-morphology ; passive film
- 分类号:
- TG174.4
- 文献标志码:
- A
- 摘要:
- 采用 ZEISS Merlin Compact 场发射扫描电镜、 OXFORD X-max N 型能谱仪、激光共聚焦显微镜等分析技术对无铬耐指纹热镀铝锌钢板黑斑缺陷进行了原因分析并提出了改进措施。结果表明:黑斑缺陷主要是由于镀层厚度凹凸不平致使钝化膜分布不均匀,镀层薄的部位钝化膜厚,镀层厚的部位钝化膜薄,钢卷在运输过程中钢板层与层之间相互摩擦致使钝化膜破损甚至脱落,导致钢板表面反射率不同,从而产生黑斑缺陷。
- Abstract:
- : ZEISS Merlin Compact field emission scanning electron microscope , OXFORD X-max N energy spectrometer , laser confocal microscope and other analytical techniques were used to analyze the causes of black spot defect of chromium-free fingerprint-resistant hot-dip aluminized zinc steel plate. And the improvement measures were also put forward. The results show that the black spot defect is mainly due to the uneven distribution of the passive film caused by the uneven thickness of the coating. The passive film is thick where the coating is thin , and the passive film is thin where the coating is thick. During the transportation of the steel coil , the friction between the steel plate layers causes the passive film to be damaged or even detached , resulting in different reflectivity of the steel plate surface , resulting in black spot defects.
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备注/Memo
收稿日期: 2023-06-06 修回日期: 2023-08-03 作者简介: 李积鹏( 1981 —),博士研究生,正高级工程师, email : lijipeng@jiugang.com * 通信作者: 姚莹, email : yaoying@jiugang.com 基金项目: 甘肃省科技重大专项( 22ZD6GB019 )?/html>