不同磷化工艺对建筑用16Mn钢的磷化效果研究

Study on Phosphating Effect of Different Phosphating Process on 16Mn Steel for Construction

选取建筑用16Mn钢作为基材,分别采用低温锌系磷化工艺和中温锌-锰系磷化工艺获得磷化膜,表征了两种磷化膜的微观形貌和成分,并比较了两种磷化膜的耐腐蚀性能。结果表明,两种磷化膜中Zn、P元素含量相差不大,锌系磷化膜的平整度和致密程度相对较好。两种磷化膜腐蚀后表面都有较多缺陷,不同位置的成分也有一定的差别。与16Mn钢相比,锌系磷化膜和锌-锰系磷化膜都表现出较好的耐腐蚀性能,且两种磷化膜的耐腐蚀性能基本相当。自行开发的低温锌系磷化工艺对16Mn钢的磷化效果并不次于成熟的中温锌-锰系磷化工艺。

The 16Mn steel for construction was selected as the substrate,two phosphating films were ob⁃tained by the low-temperature zinc-based phosphating process and the intermediate-temperature zincmanganese phosphating process.The microscopic morphology and composition of the two phosphating films were characterized,and the corrosion resistance of the two phosphating films was compared.The results showed that the content of Zn and P elements in the two phosphating films was not much differ⁃ent,and the flatness and compactness of the zinc phosphating films were relatively good.There were many defects on the surface of the two phosphating films after corrosion,and the composition of different positions was also different.Compared with 16Mn steel,both the zinc-based phosphating film and the zinc-manganese-based phosphating film exhibited better corrosion resistance,and the corrosion resis⁃tance of the two phosphating films was same basically.The self-developed low-temperature zinc-based phosphating process is not inferior to the mature intermediate-temperature zinc-manganese phosphating process on 16Mn steel.The phosphating effect of the self-developed low temperature zinc phosphating process on 16Mn steel was not inferior to that of mature medium temperature zinc-manganese phosphating process.