摘要：

使用电化学阻抗法及Tafel极化法在模拟低压工业锅炉炉水介质中研究了HEDP对20^#碳钢的缓蚀性能，并探讨了炉水中Ca²⁺、Cl^-以及Cl₄^2-对HEDP缓蚀性能的影响。实验结果表明：在模拟炉水介质中，当HEDP投加量为25 mg/L时，其对碳钢具有最佳的缓蚀效果；HEDP对碳钢腐蚀的抑制主要作用于阳极失电子反应，HEDP是一种以抑制阳极为主的缓蚀剂；炉水中Ca²⁺的存在会影响HEDP对碳钢电极的极化过程；Cl^-、Cl₄^2-等侵蚀性阴离子会促进腐蚀的加剧，影响HEDP的缓蚀性能。

关键词: 工业锅炉炉水, 碳钢, HEDP, 缓蚀剂

Abstract:

Using electrochemical impedance spectroscopy and Tafel polarization method in simulated boiler water medium of the low pressure industrial boiler,the HEDP corrosion inhibition capacity for 20^# carbon steel has been studied. The effects of Ca²⁺,Cl^- and Cl₄^2- in boiler water on the corrosion inhibition capacity of HEDP are discussed. The results show that when 25 mg/L of HEDP is added to the stimulated boiler water medium,the best corrosion inhibition result can be obtained. he inhibition effect of HEDP on carbon steel is mainly in anode betatopic reaction. HEDP is a kind of corrosion inhibitor mainly used for inhibiting anode. The presence of Ca²⁺ in boiler water can affect the polarization process of carbon steel electrode by HEDP. The erosive anions,such as Cl^- and Cl₄^2- etc. can intensify the corrosion and have negative effect on HEDP corrosion inhibiting capacity.

Key words: industrial boiler water, carbon steel, HEDP, corrosion inhibitor

中图分类号: 

• TK223.5