季鏻盐对高氯酸铝溶液中铝的缓蚀作用

INHIBITIVE EFFECT OF AROMATIC PHOSPHONIUM SALTS ON CORROSION OF ALUMINIUM IN ALUMINIUM PERCHLORATE SOLUTION

季鏻盐对高氯酸铝溶液中铝的缓蚀作用何祚清，李金良（徐州师范学院化学系徐州２２１００９）１前言为降低以Ａｌ（ＣｌＯ４）３作为电解液的Ａｌ－ＭｎＯ２干电池中Ａｌ的腐蚀速率，选用合适的缓蚀剂并对缓蚀机理进行研究是一项有意义的工作。有关季盐对钢铁及锌的缓蚀作...

The inhibitive effect of (P-NO2C6H4)N(C6H5)3Br(NPTPHB) and (p-NO2C6H4)P(C6H5)3Br(NPTPPB (CH5-C6H4)P(C6H5)aBr(MPTPPB) and [CH3(CH2)3CH2-C6H4]P(C6H5)3 Br(PPTPPB) on corrosion of aluminium in 1 mol/L Al(ClO4)3 solution at 15～35℃ and the effect of molecular structure of phosphonium salts on inhibitive efficiency were studied by using the differential polarization resistance and electrochemical impedance techniques. The results showed that all the three phosphonium salts inhibited the corrosion of aluminium. The inhibitive effect of the phosphonium salt was greater than that of the quaternary ammonium salt with similar structure. The inhibitive efficiency of the phosphonium salt which has substitution radical of long carbon chain on benzene ring was higher than that for short carbon chain.Their inhibitive efficiencies increased with rising temperature. The phosphonium salts adsorbed chemically on aluminium surface in Al(ClO4)3 solution and their adsorption followed Langmuir isotherm. Possible models of adsorption of MPTPPB and PPTPPB were proposed.