Effect of Corrosion Inhibitor TG201 on Electrochemical Corrosion Behavior of Tubular Steel HP13Cr

2012 ◽  
Vol 229-231 ◽  
pp. 155-158
Author(s):  
Cheng Xian Yin ◽  
Juantao Zhang ◽  
Zhen Quan Bai ◽  
Bin Wei
Keyword(s):  
Corrosion Inhibitor ◽  
Corrosion Behavior ◽  
Corrosion Potential ◽  
Electrochemical Corrosion ◽  
Impedance Spectrum ◽  
Compression Stress ◽  
Corrosion Morphology ◽  
Environment Effects ◽  
Electrochemical Corrosion Behavior ◽  
Resistance Performance

This paper studies effect of corrosion inhibitor TG201 on electrochemical corrosion behavior of tubular steel HP13Cr by polarization curve test and exchange impedance spectrum method. It analyzes corrosion morphology by SEM. The results show that the increase of compression stress on HP13Cr lead to its self-corrosion potential shifting negatively, then electrochemical corrosion rate increases. Finally, corrosion resistance performance of HP13Cr steel weakens in acidification environment. Effects of compression stress on electrochemical corrosion become weak by adding TG201 inhibitors. And inhibitor efficiency of TG201 has obvious increase. So controlling compression stress has certain influence on inhibitors efficiency.

Electrochemical Corrosion Behavior of Corrosion-Resistant Steel for Cargo Oil Tank

2013 ◽  
Vol 652-654 ◽  
pp. 1876-1880 ◽  
Author(s):  
Jing Xu ◽  
Jian Wei Yang ◽  
Jian Ping Cao
Keyword(s):  
Corrosion Behavior ◽  
Electrochemical Corrosion ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Corrosion Morphology ◽  
Corrosion Resistant ◽  
Cargo Oil Tank ◽  
Electrochemical Corrosion Behavior ◽  
Oil Tank ◽  
Corrosion Pit

Electrochemical corrosion behavior of corrosion-resistant steel for cargo oil tank were studied under different immersion corrosion time, and tests were carried in the PH=0.85, 10% NaCl solution, which temperature were 30°C. The electrochemical tested by the electrochemical polarization curve and electrochemical impedance spectroscopy (EIS), and the corrosion morphology and distribution of corrosion pit were observed under the metallography. The results indicate that along with the time extending, the corrosion potential of material moved from positive to negative, and then moved to positive. The corrosion current density also first reduced, then followed by the increasing and then decreasing, which indicated that the corrosion products of sample surface experienced a growth - dissolution - growth process, and presented a periodic corrosion rule. The position of corrosion pit mainly occurred around the pearlite.

scholarly journals STUDIES ON TENSILE PROPERTIES AT VARIOUS STRAIN RATES AND CORROSION BEHAVIOR OF PEAKAGED AL-6SI-0.5MG (-0.5CU) ALLOYS

2016 ◽  
Vol 17 (2) ◽  
pp. 105-115
Author(s):  
Abul Hossain ◽  
Fahmida Gulshan ◽  
A. S. W. Kurny
Keyword(s):  
Tensile Properties ◽  
Corrosion Behavior ◽  
Open Circuit Potential ◽  
Corrosion Potential ◽  
Electrochemical Corrosion ◽  
Open Circuit ◽  
Strain Rates ◽  
Cu Content ◽  
Electrochemical Corrosion Behavior ◽  
Experimental Strain

This paper focuses the effect of Cu additions on tensile properties of Al-6Si-0.5Mg alloy at various strain rates and electrochemical corrosion behavior. The additions of Cu resulted in an increase in tensile strength and showed higher strength all over the experimental strain rates. Evaluations of tensile properties at the three different strain rates (10-4, 10-3 & 10-2s-1) showed that they affected the tensile properties significantly. The strength was better at higher strain rate but ductility was poor. Eelectrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation have been used to evaluate the corrosion resistance of Cu free and 0.5wt% Cu content Al-6Si-0.5Mg alloy in 0.1M NaCl solution. The 0.5wt% Cu addition to the Al-6Si-0.5Mg alloy showed that Cu decreased susceptibility to corrosion compared to the Cu free Al-6Si-0.5Mg alloy. The magnitude of open circuit potential (OCP), corrosion potential (Ecorr) and pitting corrosion potential (Epit) of Al-6Si-0.5Mg alloy were shifted to the more noble direction due to 0.5wt% Cu addition and thermal modification.

Influence of Thermal Effect on Electrochemical Corrosion Behavior of T2 Copper in Simulated Seawater Environment

2013 ◽  
Vol 470 ◽  
pp. 128-131
Author(s):  
Ji Nan Li ◽  
Gang Chen ◽  
Peng Zhang ◽  
Qian Su ◽  
Dong Luan ◽  
...  
Keyword(s):  
Water Quality ◽  
Thermal Effect ◽  
Corrosion Behavior ◽  
Electrochemical Corrosion ◽  
Sample Surface ◽  
Corrosion Products ◽  
Solution Temperature ◽  
Corrosion Morphology ◽  
Electrochemical Corrosion Behavior ◽  
Simulated Seawater

This paper has designed electrochemical corrosion experiment of T2 copper in 3.5% NaCl solution to investigate influence of thermal effect on electrochemical corrosion behavior of copper in simulated seawater. Solution temperature was 20°C, 30°C, 40°C and 50°C. The water quality parameters and polarization curve have been measured and analyzed. Corrosion morphology and composition of corrosion products have been observed and analyzed. Thermal effect would lead to water quality variation which influenced the corrosion behavior of copper samples and corrosion potentials would fluctuate with temperature rising. Sample surface of 30°C was neatly covered with fine, uniform and granular corrosion products. There're Cu2O and CuCl on both samples of 20°Cand 30°Cand trace corrosion product of CuC2O40.5H2O and CuCl2 of only 30°C.

scholarly journals Effect of Cu content on the Electrochemical Corrosion Behavior of Peak-aged Al-6Si-0.5Mg Alloys in Sodium Chloride Solution

2016 ◽  
Vol 44 ◽  
pp. 29-35
Author(s):  
Abul Hossain ◽  
M. A. Gafur ◽  
Fahmida Gulshan ◽  
A. S. W. Kurny
Keyword(s):  
Corrosion Behavior ◽  
Polarization Resistance ◽  
Corrosion Potential ◽  
Electrochemical Corrosion ◽  
Open Circuit ◽  
Test Results ◽  
Nacl Solution ◽  
Cu Content ◽  
Electrochemical Corrosion Behavior ◽  
Peak Aged

The purpose of this study is to understand the electrochemical corrosion behavior of 1wt% Cu content Al-6Si-0.5Mg alloy in 0.1M NaCl solution. The potentiodynamic polarization curves reveal that 1wt% Cu content alloy is less prone to corrosion than the Cu free alloy. The EIS test results show that corrosion resistance or polarization resistance (Rct) increases with the addition of 1wt% Cu to Al-6Si-0.5Mg alloy. Higher polarization resistance (Rp) has been obtained with the addition of 1wt% Cu to the Al-6Si-0.5Mg alloy. Due to addition of Cu and thermal modification, the magnitude of open circuit potential (OCP), corrosion potential (Ecorr) and pitting corrosion potential (Epit) of Al-6Si-0.5Mg alloy in NaCl solution were shifted to the more noble direction.

Effect of Cu on the Electrochemical Corrosion Behavior of Sn-8Zn-3Bi Lead-Free Solder Alloy

2015 ◽  
Vol 1095 ◽  
pp. 95-98
Author(s):  
Li Ma ◽  
Qiang Hu ◽  
Yan Bin Sun
Keyword(s):  
Corrosion Resistance ◽  
Solder Alloy ◽  
Corrosion Behavior ◽  
Corrosion Potential ◽  
Electrochemical Corrosion ◽  
Lead Free ◽  
Lead Free Solder ◽  
Cu Content ◽  
Electrochemical Corrosion Behavior ◽  
Free Solder

The electrochemical corrosion behavior of the Sn-8Zn-3Bi-xCu lead-free solder in 3.5%NaCl solution was studied to reveal effect of Cu addition on the corrosion resistance of Sn-8Zn-3Bi solder alloy. The results showed that adding Cu element increased the corrosion potential of Sn-8Zn-3Bi-xCu solder alloysThe corrosion resistance of Sn-8Zn-3Bi-xCu solder alloys was improved correspondingly. The corrousion product of Sn-8Zn-3Bi-xCu alloy was mainly zinc oxide. More corrosion products were observed with the increse of Cu content.

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