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锌铝镁镀层钢板的镀层质量以及镀层中铝镁铁的测定 被引量:8

Determination of coating mass and the content of aluminum,magnesium and iron in coating for zinc-aluminummagnesium coating steel plate
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摘要 在锌铝镁镀层钢板生产中,单位面积上镀层质量和镀层中合金元素组成是产品质量的重要评价标准。试验对锌镁铝镀层的单位面积上镀层质量、镀层元素分布以及合金元素含量分别进行了探讨。利用重量法测定单位面积上镀层质量,腐蚀溶液由4.5g/L六次甲基四胺-盐酸(1+1)溶液组成。利用扫描电镜(SEM)观察镀层表面的形貌,并通过能谱仪(EDS)进行了微区元素成分分析,发现了不同物相在镀层中的分布特征及各元素在不同相中的分布规律。利用电感耦合等离子体原子发射光谱法(ICP-AES)同时测定了镀层中铝、镁、铁含量。按照实验方法采用ICP-AES测定热浸镀锌铝镁镀层钢板的镀层中铝、镁和铁,结果的相对标准偏差(RSD,n=6)分别为0.80%、0.76%和1.4%,加标回收率为97%~102%。 During the production of zinc-aluminum-magnesium coating steel sheets,the coating mass per unit area and the composition of alloying elements in coating were important evaluation parameters for the quality of products.The coating mass per unit area,the elemental distribution in coating and the contents of alloying elements in zinc-magnesium-aluminum coating were discussed.The coating mass per unit area was measured by gravimetric method.The corrosion solution was composed of 4.5 g/L hexamethylenetetramine-hydrochloric acid(1+1).The surface morphology of coating was observed by scanning electron microscopy(SEM).The composition in micro-zone was analyzed by energy dispersive spectroscopy(EDS).The distribution characteristic of different phases in the coating as well as the distribution rule of elements in different phases was found out.The contents of aluminum,magnesium and iron in the coating were simultaneously determined by inductively coupled plasma atomic emission spectrometry(ICP-AES).The proposed method was applied for the determination of aluminum,magnesium and iron in the coating of hot-dip galvanizing zinc-aluminum-magnesium coating steel plate.The relative standard deviation(RSD,n=6)of the determination results for aluminum,magnesium and iron was 0.80%,0.76%and 1.4%,respectively.The recoveries were between 97%and 102%.
作者 邱婉凌 秦汉成 杨志强 QIU Wan-ling;QIN Han-cheng;YANG Zhi-qiang(Technology Research Institute of Shougang Group Co.,Ltd.,Beijing100043,China)
出处 《冶金分析》 CAS 北大核心 2019年第12期45-49,共5页 Metallurgical Analysis
关键词 锌铝镁镀层 重量法 单位面积上镀层质量 电感耦合等离子体原子发射光谱法(ICP-AES) zinc-aluminum-magnesium coating gravimetric method coating mass per unit area inductively coupled plasma atomic emission spectrometry(ICP-AES) aluminum magnesium iron
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