应用极化曲线、电化学阻抗谱等测试技术,研究了以谷氨酸作缓蚀剂在10%盐酸介质中对X65钢的缓蚀作用,测试腐蚀参数包括腐蚀电位(Ecorr)、极化电阻(Rp)、缓蚀效率(η)等.研究表明:该缓蚀剂是一种抑制阴极为主的混合型缓蚀剂,在较低的浓度具有良好缓蚀效果;缓蚀效率随着浓度的增加而提高,并在0.3g.L-1时达到最大值(90%以上).
The inhibition effect of glutamic acid towards the corrosion of X65 steel in hydrochloric acid solution(10%) was investigated using polarization techniques、electrochemical impedance spectroscopy(EIS) and SEM.The corrosion rate,corrosion potential(Ecoor),polarization resistance(Rp) and inhibition efficiency(η) were determined.The results revealed that the inhibitor is a mixed type inhibitor.It has promising corrosion inhibition efficiency at low concentrations.The inhibition efficiency(η) increased with increasing the concentration.The maximum inhibition efficiency appeared at 0.3 g·L-1.
[1]ZH0U XiaoXiang(周晓湘),LIU JianPing(刘建平).Present state of the application of corrosion inhibitors toacid pickling and its development trend[J].IndustrialWater Treatment,2002,22(1):16-18.
[2]Ashassi-Sorkhabi H,Majidi MR,Seyyedi K.Investiga-tion of inhibition effect of some amino acids against steelcorrosion in HCl solution[J].Applied Surface Sci-ence,2004,225:176-185.
[3]Ashassi-Sorkhabi H,Ghasemi Z,Seifzadeh D.The inhi-bition effect of some amino acids towards the corrosion ofaluminum in 1MHCl+1MH2SO4solution[J].AppliedSurface Science,2005,225:408-418.
[4]Ghasemi Z,Tizpar A.The inhibition effect of some ami-no acids towards Pb-Sb-Se-As alloy corrosion in sulfuricacid solution[J].Applied Surface Science,2006,252(10):3667-3672.
[5]Cui RongJing(崔荣静),Gu Ning(谷宁),Li ChunMei(李春梅).Adsorption of polyasparfic acid from sulphuracid solution on carbon steel and its corrosion inhibition[J].Electrochemistry,2005,11(3):294-297.
[6]Waheed A Badawy,Khaled M Ismail,Ahlam M Fathi.Corrosion control of Cu-Ni alloys in neutral chloride so-lutions by amino acids[J].Electrochimica Acta,2006,51(20):4182-4189.
[7]El-Rabiee M M,Helal N H,Gh MAbd El-Hafez,et al.Corrosion control of vanadium in aqueous solutions by a-mino acids[J].Alloys and Compounds,2007,4.
