Through quantitative and SEM analysis, the minim zinc was found remaining on the surfaceofweld and the zinc thickness on the heat-affected zones appeared gradient.
定量及SEM分析表明，焊缝中表面只残留少量锌，在焊缝两侧的热影响区，锌层厚度呈梯度分布。
2
On overall inspection of interior and exterior of pre-hydrogenating reactor of Shanghai Oil Refinery Factory, large cracks was found on the surfaceofweld and inside of the weld.
在上海炼油厂预加氢反应器投用前的内外部检验中，发现了大量的焊缝表面裂纹和内部埋藏裂纹。
3
A passivation procedure can be modified to deal with a variety of soils, surface finishes and weld area conditions.