Quantitative Analysis of Zn-Fe Alloy Electroplated Layer on Steel Sheets by Glow Discharge Spectrometry

Grimm-type glow discharge spectrometry (GDS) was used for in-depth quantitative analysis of Zn-Fe alloy electroplated layer on steel sheets.In order to improve the in-depth resolution of GDS data, Zn-Fe alloy mono-layer electrodeposits on Cu were measured under various discharge conditions and by changing the dimensions of the discharge lamp, such as the thickness of anode pipe and the distances between anode pipe and the sample.According to this experiment, the most suitable conditions for getting the good in-depth resolution were determined as follows:·Thickness of anode pipe: 3.5 mm·Distance between anode pipe and sample: 0.1 mm·Discharge condition: 3 Torr-40 mACalibration curve method was adopted for determining both Fe concentration and the sputter rate for the determined Fe concentration.By the improvement of in-depth resolution and the establishment of the quantitative analysis method of GDS for the measurement of Zn-Fe alloy electroplated layer, GDS will be widely used as the surface analysis technique for various plated metals.