材料期刊网

对工业酸性气氛环境下经过10年使用的工厂钢筋混凝土采样，用EDS、XRD和SEM，以及力学性能测试等手段观测了钢筋的腐蚀产物成分和基体成分、混凝土的主要化学组成、微观形貌结构及钢筋的力学性能；另外，还定量分析了钢筋混凝土所处的大气环境中主要腐蚀性气体的含量进行了定量分析.结果表明，含S的酸性气体在箍筋表面的吸附与沉积是钢筋混凝土遭受破坏的主要原因，钢筋腐蚀的发生与Cl-诱发的点蚀不同；大量酸性含S及CO2的气体导致混凝土的水泥水化产物和其微观结构发生了变化，特别是含S气体的存在对钢筋混凝土的中性化起重要作用.

The samples of the reinforced steel in acidic environment were taken separately above 10 years in usage.The rebar was analyzed by the energy dispersive spectrometry（EDS），X-ray diffraction( XRD),scanning electron microscope(SEM) and the mechanical method to investigate the corrosion behavior of the rebar,the chemical compositions and the microstructure of the cement and the mechanical performance individually.Furthermore the instantaneous state sampling method was taken to estimate the contents of the main corrosive gases in the environment quantitatively.The results have shown that the adsorption and deposition of the sulfur element on the rebar made much contribution to the corrosion of the reinforced steel.The corrosion behavior in the acidic environment is different from that induced by the chloride ion .The gases which contain the sulfur element can react with the main compositions of the cement and therefore made the microstructure of the concrete changed ,which play an important role in the neutralization of the concrete.