Abstract: The inhibition effect of supramolecular corrosion inhibitor CDDA on the iron content in industrial boiler vapor condensate water has been investigated both in laboratory and field environment,and the CDDA corrosion inhibition mechanism for carbon steel discussed by means of gravimetric analysis, electrochemistry and surface analysis. The results show that CDDA can effectively inhibit the iron content in vapor condensate water. The on site tests show that after the addition of CDDA,the total iron mass concentration keeps at 60-70 μg/L,which is in accordance with the recycled water standard. CDDA uses the guest octadecylamine as an effective corrosion inhibition component to be adsorbed on the surface of carbon steel,and inhibits the anodic dissolution process,so as to reduce the corrosive products to penetrate into the condensate water. The highest corrosion inhibition rate can reach 93.84%. The treated condensate water can be used as make-up water after mixed with a portion of softened water,which is beneficial to the realization of energy-saving and emission-reduction.

Key words: corrosion inhibitor, supramolecular chemistry, vapor condensate water, recycling with energy

摘要： 在实验室与现场环境下考察了超分子缓蚀剂CDDA对工业锅炉蒸汽凝结水中铁含量的抑制效应，并通过重量法、电化学与表面分析探讨了CDDA对碳钢的缓蚀机理。结果表明，CDDA可有效抑制蒸汽凝结水中的铁含量。现场监测显示，投加CDDA后，总铁质量浓度维持在60~70 μg/L，符合回水标准。CDDA以客体十八胺为有效缓蚀组分吸附于碳钢表面，并抑制阳极溶解过程，以减少腐蚀产物侵入凝结水，缓蚀率最高可达93.84%。处理后的凝结水与部分软化水混合后可用作锅炉补水，利于实现节能减排。

关键词: 缓蚀剂, 超分子化学, 蒸汽凝结水, 含能回用

CLC Number: 

• TK223.5