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镀锌钢管的合金化,就是将镀锌钢管进行扩散退火热处理,这样处理后,纯锌层变为比较富有塑性的、利于焊接的、涂漆的铁—锌合金化镀层。经过盐雾试验证明:经合金化的镀锌管比未经合金化的镀锌管,其耐蚀性提高1～2倍以上;海洋条件下试用前者比后者的耐蚀性提高1～2倍。漆膜的涂着性也是比后者优越得多,经球冲法粘附性测试可达一级,而后者只能达4级。焊接性能及机械加工性能也比后者好。 国际上,美、日、英及苏联等国已将合金化镀锌钢管应用到建筑、海洋、油田、焦化等工业方面,效果显著。从上可见,对镀锌钢管进行合金化处理,是一种很有前途的高效材料制造方法。
Galvanized steel alloy, galvanized steel is the diffusion annealing annealing, so that treatment, the pure zinc layer becomes more plastic, and conducive to welding, painting iron - zinc alloy coating. After salt spray test shows that: the alloyed galvanized pipe than the galvanized pipe without the alloy, the corrosion resistance increased by 1 to 2 times; the trial of the former under the sea conditions than the latter corrosion resistance increased by 1 to 2 Times The coating is also much more pliant than the latter, which is up to one level by the ball-to-ball adhesion test and only up to level 4 for the latter. Welding performance and machining performance than the latter. Internationally, the United States, Japan, Britain and the Soviet Union and other countries have alloying galvanized steel pipe applied to the construction, marine, oil, coking and other industries, the effect is remarkable. It can be seen from the above that the alloying treatment of the galvanized steel pipe is a very promising and efficient material manufacturing method.