【摘要】 分别采用热喷涂和高压无气喷涂工艺在16MnR钢基体表面制备Zn-Al系涂层和纳米重防腐蚀有机涂层,研究了涂层在混凝土加速腐蚀环境中的腐蚀特性。结果表明:Zn-Al系涂层中Zn涂层的耐蚀性弱于Zn-Al涂层和Al涂层的,其腐蚀为阳极牺牲引发的整体腐蚀;有机涂层的腐蚀主要源于腐蚀介质的渗透和填料Zn粉的电化学反应。预估了Zn涂层和有机涂层在混凝土加速腐蚀环境中的腐蚀寿命:在该环境中180d后,Zn涂层近乎被蚀穿,而有机涂层仍对基体有较好的保护作用。更多还原

【Abstract】 Thermal spraying and high-pressure airless spraying processes were used to prepare Zn-Al-based coatings and nano heavy-duty anti-corrosion organic coatings on the surface of 16 MnR steel substrates,respectively,and the corrosion characteristics of the coatings in a accelerated corrosion environment of concrete were also studied.The results showed that the corrosion resistance of Zn coating in Zn-Al ceries coatings was weaker than that of Zn-Al coatings and Al coatings,and the corrosion characteristic was the overall corrosion caused by anode sacrifice.The corrosion of organic coatings mainly resulted from the permeation of corrosive media and the electrochemical reaction of filler Zn powder.The corrosion life of Zn coating and organic coating in the accelerated concrete corrosion environment was estimated:after 180 din this environment,Zn coating was nearly penetrated,while the organic coating still had a good protective effect on the substrate.更多还原