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Comparison of the corrosion behaviour of AZ31B magnesium alloy under immersion test and potentiodynamic polarization test in NaCl solution

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Journal of Magnesium and Alloys 2014年第1期2卷 36-49页

作者： D.Thirumalaikumarasamy K.Shanmugam V.Balasubramanian Department of Manufacturing Engineering Annamalai UniversityAnnamalainagar608002 ChidambaramTamil NaduIndia

This paper reports the comparative evaluation of the corrosion behaviour of AZ31B magnesium alloy under immersion and potentiodynamic polarization test in NaCl solution at different chloride ion concentrations,pH value and exposure *** specimens were exposed to immersion and polarization environments in order to evaluate their corrosion *** relationship was established to predict the corrosion rate of AZ31B magnesium *** factors,five level,central composite rotatable design matrix was used to minimize the number of experimental *** surface methodology was used to develop the *** developed relationship can be effectively used to predict the corrosion rate of AZ31B magnesium alloy at 95%confidence level for both the *** research work proves a better corrosion resistance of AZ31B magnesium alloy at the alkaline solution than the acidic and the neutral solutions,moreover,low corrosion rate was found at low concentrated solution and higher exposure time respectively.

关键词： Magnesium alloy immersion tests Potentiodynamic polarization tests Response surface methodology Corrosion rate

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Effect of environmental factors on corrosion behavior of L360QCS pipeline steel in H2S/CO2 environments

Effect of environmental factors on corrosion behavior of L36...

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2015年第十四届全国应用化学年会

作者： X.S.huang Y.M.Qi C.F.Chen H.B.Yu G.W.Lu

The present research investigated the effect of HS/CO partial pressure, sulphur deposition and corrosion inhibitor on the corrosion behaviour of L360 QCS pipeline steel in HS/CO environments by immersion tests, scanning electron microscope analysis and electrochemical measurements. The results show that the corrosion rate(CR) of L360 QCS steel decreased first and then increased with increasing P and *** CR is closely associated with the protectiveness of corrosion film. Sulphur deposition can cause an acceleration of the corrosion of steel in HS/CO environments. Furthermore, the CR increased obviously with increasing P and PCO in sulphur deposition environments. After addition of continuous corrosion inhibitor, the CR decreased significantly in HS/CO environments. Prefilming corrosion inhibitor could enhance the inhibition effect in the presence of continuous corrosion inhibitor.

关键词： L360QCS pipeline steel Sulphur deposition H2S/CO2 corrosion Continuous and prefilming corrosion inhibitor immersion tests

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