薄镀层镀锡板产品(0.25磅/基箱)的焊缝强度不足,一直是质量控制的一个问题。通过对不合格焊缝进行检查,发现其中包含有焊料浸润性丧失的区域(见图1)。为了比较起见,在图2中示出了良好的罐头焊缝的情况。在这种情况下,焊缝的分离是由于焊料本身内聚性不良而造成的,不是因为浸润性丧失的缘故。由于浸润性将为良好的焊缝强度提供条件,因此焊接不合格就与浸润性丧失的影响相关。从广义上讲,浸润性丧失的程度是固体表面性质、液体性质以及接触动力学的函数。假定焊 Insufficient weld strength in thin-coated tinplate products (0.25 lb / base case) has been a problem in quality control. By inspecting unqualified welds, it was found that there was an area of ​​loss of solder wettability (see Figure 1). For the sake of comparison, the case of a good can weld is shown in FIG. 2. In this case, the weld separation is due to poor cohesion of the solder itself, not due to loss of wettability. Because wetting will provide good weld seam strength, weld failure is related to the effect of loss of wettability. In a broad sense, the degree of infiltration loss is a function of solid surface properties, liquid properties, and contact kinetics. Assuming welding