Abstract：The passive film thickness of tin plate type 71 is closely related to the product quality and property, so its accurate determination is of great significance. Seven pieces of tin plate type 71 samples with different passive film thickness gradient were selected and sampled according to the satellite sampling method in GB/T 1838. The spectrophotometry in GB/T 28290 was adopted for quantification. These samples were used as calibration sample series for the preparation of calibration curve. The determination of passive film thickness of tin plate type 71 by X-ray fluorescence spectrometry (XRF) was realized. Since the passive film type 71 contained various forms such as chromium oxide, chromium hydroxide and chromium metal, and the storage and quantification of passive film standard sample could be seriously affected by the content of chromium metal and the variation of chromium oxide layer with time, the accuracy of calibration curve would be influenced. The methods for rapid stabilization of passive layer were discussed in experiments. The corrosion resistance of surface passive film was investigated using polarization curve. The results indicated that when it was heated at 200 ℃ for 15 min, the corrosion current density was lowest, and the corrosion resistance of tin plate was best. The calibration sample 2# with passive film thickness of 4.26 g/m2 was used for short-term stability and long-term stability tests. The results showed that the relative standard deviation (RSD, n=10) of determination results of short-term stability and long-term stability tests was 1.2% and 2.0%, respectively, which could meet the requirement of intra-laboratory RSD less than 5.3% in GB/T 27417. Six samples of passive film tin plate type 71 were selected and analyzed according to the experimental method and spectrophotometry in GB/T 28290. The results showed that the found results of this method were basically consistent with those obtained by spectrophotometry. The statistical magnitude P=0.817 5 was obtained through calculation, indicating that there was no significant difference between two groups of data.
刘洋, 朱启茂, 何小琴, 姚远, 陈梦乔. X射线荧光光谱法测定锡钢板71型钝化膜厚度[J]. 冶金分析, 2024, 44(8): 67-71.
LIU Yang, ZHU Qimao, HE Xiaoqin, YAO Yuan, CHEN Mengqiao. Determination of passive film thickness of tin plate type 71 by X-ray fluorescence spectrometry. , 2024, 44(8): 67-71.
[1] 卢锦堂,宋进兵,陈锦虹,等.无铬钝化的研究进展[J].材料保护(Materials Protection),1999(3):24-26. [2] 杨哲龙,张景双,钱新民,等.钛及其合金阳极氧化与着色工艺研究[J].材料保护(Materials Protection),1989(7):11-14,3. [3] 曾华梁,吴仲达,秦月文,等.电镀工艺手册[M].北京:机械工业出版社,1996:445-457. [4] 王琬,范纯,华犇,等.镀锡板71钝化表面铬含量测定方法研究[J].宝钢技术,2022(6):20-25. WANG Wan,FAN Chun,HUA Ben,et al.Research on determination method of chromium content on the surface of 71 passivated tinplate[J].Baosteel Technology,2022(6):20-25. [5] 柳长福,郭玉华.镀锡板表面铬酸盐钝化膜的研究[J].钢铁研究,2000(3):38-42. LIU Changfu,GUO Yuhua.Studies on chromate passivation film on tinplate surface[J].Research on Iron and Steel,2000(3):38-42. [6] 王洺浩.镀锡板表面钝化膜的厚度分布及其组成与性能的研究[D].哈尔滨:哈尔滨工业大学,2018. [7] 黄久贵,李宁,蒋丽敏,等.镀锡板耐蚀性研究及进展[J].电镀与环保,2003(6):5-9. HUANG Jiugui,LI Ning,JIANG Limin,et al.Research and progress in the corrosion resistance of tinplate and its progress[J]. Electroplating & Pollution Control,2003(6):5-9. [8] 王洺浩,陆永亮,翟运飞,等.钝化方式对镀锡板钝化膜组成与性能的影响[J].电镀与涂饰,2015,34(16):903-908. WANG Minghao,LU Yongliang,ZHAI Yunfei,et al.Effect of different passivation method on composition and performance of the passivation film on tinplate[J].Electroplating & Finishing,2015,34(16):903-908. [9] 曹宏燕.分析测试统计方法和质量控制[M].北京:化学工业出版社,2016:42-43. [10] 黄近丹.数理统计方法在分析测试中的应用[J].福建分析测试,2016,25(1):32-34. HUANG Jindan.Application of mathematical statistics in field of analysis test[J].Fujian Analysis & Testing,2016,25(1):32-34.
