【摘要】 在实验室模拟含有5×10-6(体积分数)SO2和1%(体积分数)CO2污染成分的大气环境,采用增重法研究沉积NaCl的Q235钢的初期大气腐蚀规律.用扫描电镜和X射线衍射分析腐蚀产物.结果表明,当Q235钢表面沉积NaCl时,在SO2、CO2和NaCl的协同作用下,导致Q235钢发生严重腐蚀,腐蚀产物主要是Fe3O4,其次为γ-Fe2O3,还存在有γ-FeOOH.更多还原

【Abstract】 The influence of NaCl on the initial atmospheric corrosion of Q235 steel in simulated atmospheric environment including 5×10^-6（volume） SO₂ and 1%（volume） CO₂ are investigated by mass gain,SEM and X-ray diffraction techniques.The results show that Q235 steel suffer a serious corrosion under the cooperative effect of NaCl,CO₂ and SO₂.It proved that the cooperative effect of SO₂ and CO₂ is important for the corrosion aggravating of Q235 steel when the NaCl is existed.The presence of NaCl accelerated and catalyzed the reaction of initial stage of atmospheric corrosion for carbon steel.The mass gain in the presence of NaCl was near decuple higher than that in the absence of NaCl.The corrosion products mainly are Fe₃O₄,γ-Fe₂O₃ and γ-FeOOH.更多还原