Synergistic inhibition effect of Polyacrylamide and Tetradecylpyridinium bromide on corrosion behavior of carbon steel rebar in simulated cement-mortar pore solution

2021 ◽  
pp. ArticleID:210626
Author(s):  
Ruo-li Shi ◽  
Keyword(s):  
Carbon Steel ◽  
Corrosion Behavior ◽  
Cement Mortar ◽  
Pore Solution ◽  
Inhibition Effect ◽  
Synergistic Inhibition ◽  
Steel Rebar ◽  
Synergistic Inhibition Effect

scholarly journals Inhibition of Q235 Carbon Steel by Calcium Lignosulfonate and Sodium Molybdate in Carbonated Concrete Pore Solution

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 518 ◽  
Author(s):  
Bing Lin ◽  
Yu Zuo
Keyword(s):  
Carbon Steel ◽  
Surface Analysis ◽  
Pore Solution ◽  
Sodium Molybdate ◽  
Solution Ph ◽  
Pitting Potential ◽  
Inhibition Effect ◽  
Surface Analysis Techniques ◽  
Q235 Carbon Steel ◽  
Synergistic Inhibition Effect

The inhibition effect and mechanism of a compound calcium lignosulfonate (CLS) and sodium molybdate inhibitors for Q235 carbon steel in simulated carbonated concrete pore solution (pH 11.5) with 0.02 mol/L NaCl are studied using electrochemical and surface analysis techniques. The results show that in carbonated simulated concrete pore (SCP) solution CLS and Na2MoO4 show a synergistic inhibition effect. The compound inhibitor can be defined as mix-type inhibitor. With 400 ppm CLS plus 600 ppm Na2MoO4, the pitting potential moves positively about 200 mV, and the inhibition efficiency reaches 92.67%. After 24 h immersion, the IE% further increases up to 99.2%. The surface analysis results show that Na2MoO4 could promote stability of the passive film, and the insoluble molybdenum compounds and CaO/Ca(OH)2, together with adsorbed CLS, deposit on the steel surface, forming a complex film. The compounded film effectively inhibits corrosion of the steel.

SYNERGISM OF RARE EARTH Ce(III) ION WITH CYSTEINE AGAINST CORROSION OF P110 CARBON STEEL IN 3% NaCl SOLUTIONS

2017 ◽  
Vol 24 (02) ◽  
pp. 1750024 ◽  
Author(s):  
XIA LIU ◽  
JIANSHU YANG ◽  
YONGPING LIU ◽  
XIANGYUN JI ◽  
YING LU ◽  
...  
Keyword(s):  
Rare Earth ◽  
Carbon Steel ◽  
Inhibition Efficiency ◽  
Inhibition Effect ◽  
Synergistic Inhibition ◽  
Potentiodynamic Polarization Curves ◽  
Ir Reflection ◽  
Ir Reflection Spectra ◽  
Corrosion Inhibition Efficiency ◽  
Synergistic Inhibition Effect

The synergism of CeCl3 (Ce) with cysteine (Cys) on the corrosion of P110 carbon steel in 3% NaCl solutions was investigated by electrochemical methods and surface analysis. The results showed that CeCl3 and cysteine do little to inhibit the corrosion of carbon steel, but the combination of CeCl3 with cysteine has obvious synergistic effect on the corrosion of carbon steel and the corrosion inhibition efficiency was improved significantly. The potentiodynamic polarization curves indicated that the mixture of CeCl3 and cysteine acts as a cathodic inhibitor. Scanning electron microscope (SEM) and Infrared (IR) reflection spectra showed the synergistic inhibition effect was formed by the complexes between rare earth Ce(III) ion and amino acid.

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