Online coating thickness measurement and depth profiling of zinc coated sheet steel by laser-induced breakdown spectroscopy

被引：50

作者：

Balzer, H ^{[1
]}

Hoehne, M ^{[1
]}

Sturm, V ^{[1
]}

Noll, R ^{[1
]}

机构：

[1] Fraunhofer Inst Lasertech, ILT, D-52074 Aachen, Germany

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2005年 / 60卷 / 7-8期

关键词：

laser-induced breakdown spectroscopy; depth profile; galvanized coating; Zn; online analysis;

D O I：

10.1016/j.sab.2005.07.003

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

In this study a new method for online analysis of the zinc coating of galvanized sheet steel based on laser-induced breakdown spectroscopy (LIBS) is presented. The coating is characterized with a series of single laser bursts irradiated on the traversing sheet steel, each on a different sheet steel position. To achieve an ablation depth in the range of the coating thickness of about 10 mu m a Nd:YAG laser at 1064 nm in collinear double pulse mode was used. The depth information is obtained by control of the ablation depth by adjusting the burst energy using an external electro-optical attenuator. Concepts for the determination of the coating thickness and the chemical composition are presented. The achieved thickness resolution is estimated to about 400 nm for coating thicknesses of electrolytic galvanized sheet steel in the range of 3.2 to 11.2 mu m. In the case of hot-dip galvanized sheet steel information about the depth profile of aluminium can be gained by the new method. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1172 / 1178

页数：7

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