摘要
化工大气环境中含有较多的腐蚀性介质,对钢结构腐蚀严重。为了评价石油化工大气环境的腐蚀性,采用4种标准金属材料进行石油化工大气环境现场暴露试验,对石油化工大气环境腐蚀性进行评级;同时选用8种防腐蚀体系试样进行暴露试验,以评价其防护效果。结果表明:石油化工大气环境中含有较高浓度的二氧化硫、硫化氢等腐蚀介质,腐蚀等级属C4～C5级;保护层体系中,由喷铝或富锌底漆、环氧云铁中间漆、氟碳树脂(或丙烯酸聚氨酯)面漆组成的防护体系的综合耐蚀性和耐候性较好。
Four kinds of standard metals were tested in exposed atmosphere of petrochemical industry so as to determine the corrosive grade of the corrosive atmosphere. In the meantime, eight kinds of anticorro-sive systems were also tested in the exposed corrosive atmosphere so as to evaluate their protective effect. It was found that high concentrations of corrosive mediums such as sulfur dioxide and hydrogen sulfide were present in the atmosphere of petrochemical industry. The atmospheric corrosion grade was from C4 to C5, corresponding to serious corrosion of carbon steel. Moreover, in terms of various protective systems, the one consisting of sprayed Al primer or Zn-rich primer, epoxy micaceous iron oxide intermediate paint, and fluorocarbon resin finish (or acrylic polyurethane coating) possessed the best corrosion resistance and weatherability.
出处
《材料保护》
CAS
CSCD
北大核心
2013年第3期67-69,2,共3页
Materials Protection
关键词
化工大气
钢结构
腐蚀与防护
大气暴露试验
耐蚀性
耐候性
atmospheric environment of petrochemical industry
steel structure
corrosion and protection
exposed atmosphere
corrosion resistance
weatherability
