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使用氯化物钎剂钎焊的铝及铝合金,其中最大的问题就是接头的腐蚀问题。为了解决这一问题,曾经想了很多办法,如:真空钎焊、惰性气体保护钎焊等。在此,仅根据观察到的腐蚀现象、试验结果和现有的腐蚀理论,讨论如下。铝钎焊接头的腐蚀现象铝钎焊接头的腐蚀现象可以归纳为下列四种类型:①表面局部腐蚀。它发生在表面焊缝上,或近缝区母材上,腐蚀痕迹是白斑或松疏的腐蚀产物,腐蚀物下面是麻坑。②皮下腐蚀。它发生在钎缝内部的夹渣处。夹渣通过钎缝处的缺陷(如气孔、疏松等)与大气串通,
Chloride flux brazing aluminum and aluminum alloys, the biggest problem is the joint corrosion problems. In order to solve this problem, we have thought of many ways, such as: vacuum brazing, inert gas brazing and so on. The following discussion is based on observed corrosion phenomena, test results and existing corrosion theory. Corrosion of aluminum brazed joints Corrosion of aluminum brazed joints can be summarized into the following four types: ① surface localized corrosion. It occurs in the surface of the weld, or near the seam area of the base material, corrosion marks are white or loose corrosion products, corrosion is Ma Hang. ② subcutaneous erosion. It occurs in the brazing seam within the slag Department. Clad slag through brazing at the defects (such as stomata, porosity, etc.) collusion with the atmosphere,