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纯铁经十八烷基胺处理后耐蚀性显著提高.样品在气相中的成膜效果优于液相;液相温度在220℃左右成膜效果最佳;成膜效果随十八烷基胺浓度的增加而上升,但是当十八烷基胺浓度超过25mg/L左右,成膜效果反而下降;实验室显示,在有锈垢的电厂运行管上,ODA也有较好的成膜效果;俄歇电子能谱测量表明,十八烷基胺处理的铁表面层结构为:十八胺浓度较低时:铁|氧化铁层|含氧化铁的十八烷基胺层;十八胺浓度较高时:铁|氧化铁层|含氧化铁的十八烷基胺层|十八烷基胺层
The corrosion resistance of pure iron after treated with octadecylamine was significantly improved.The film formation in the gas phase was better than that in the liquid phase.The film formation was best at the liquidus temperature of about 220 ℃ .The film formation efficiency was improved with octadecyl However, when the concentration of octadecylamine is more than 25mg / L, the effect of film formation decreases. Laboratory tests show that ODA also has a better film forming effect on the operation pipe with rust scale. Auger electron spectroscopy measurements showed that the octadecylamine-treated iron surface layer structure was as follows: when the octadecylamine concentration was low: iron | iron oxide layer | iron octadecylamine layer; octadecyl amine concentration Higher: iron | iron oxide | iron oxide containing octadecylamine | octadecylamine layer