Surface composition profiles of tinplates were measured by glow discharge spectrum (GDS), and the metallic phases and grain sizes of blank plates were studied by metallographic microscope.

• 采用辉光放电光谱仪测试了大量镀锡板的表层成分分布；采用金相显微镜测试了大量原板的金相结构，并计算出了晶粒度。