Study on the Complex of Sodium Tungstate and Urotropine as Inhibitors against Stainless Steel Corrosion in the NaCl Solution

2011 ◽  
Vol 689 ◽  
pp. 450-454 ◽  
Author(s):  
Qiang Song ◽  
Xing Qi Qiu
Keyword(s):  
Stainless Steel ◽  
Sodium Tungstate ◽  
Total Concentration ◽  
Steel Corrosion ◽  
Inhibitory Effect ◽  
304 Stainless Steel ◽  
Nacl Solution ◽  
Weight Loss Method ◽  
Synergistic Inhibitory Effect ◽  
Loss Method

The corrosion weight loss method and polarization curve measurement were conducted to study the effects of the complex inhibitor of sodium tungstate and urotropine on the corrosion of 304 stainless steel in the 3.5% NaCl solution. The results indicated that the complex inhibitor has good synergistic inhibitory effect for stainless steel in the NaCl solution. Combining sodium tungstate and urotrpine at a total concentration of 500 mg/L, when the mass ratio of sodium tungstate to urotrpine was 7:3, the inhibitory effect was optimum. In addition, the probable inhibitory mechanism was analyzed.

scholarly journals The inhibition of mild steel corrosion in 0.5 M H2SO4 solution by radish leaf extract

RSC Advances ◽  
2019 ◽  
Vol 9 (70) ◽  
pp. 40997-41009 ◽  
Author(s):  
Dongyi Li ◽  
Panpan Zhang ◽  
Xinyu Guo ◽  
Xiaowei Zhao ◽  
Ying Xu
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Electrochemical Method ◽  
Leaf Extract ◽  
Steel Corrosion ◽  
Inhibitory Effect ◽  
H2so4 Solution ◽  
Mild Steel Corrosion ◽  
Weight Loss Method ◽  
Loss Method

The inhibitory effect of radish leaf extract (RLE) on mild steel corrosion in 0.5 M H2SO4 was studied by the weight loss method and the electrochemical method.

scholarly journals THE INHIBITION AND ADSORPTION PROPERTIES OF DTPMP TSC ON STAINLESS STEEL IN ACIDIC MEDIUM

2017 ◽  
Vol 6 (1) ◽  
pp. 897-908
Author(s):  
P. Selva Kumar
Keyword(s):  
Stainless Steel ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Trisodium Citrate ◽  
Entropy Change ◽  
Stainless Steel Surface ◽  
Protective Film ◽  
Polarization Study ◽  
Weight Loss Method ◽  
Loss Method

The inhibition effect of diethylenetriamine penta(methylene phosphonic acid) (DTPMP) and Trisodium Citrate (TSC) on thecorrosion behavior of stainless steel in 0.5 M H2SO4 solution was investigated by using weight loss method. The combinedcorrosion inhibition efficiency offered 200 ppm of DTPMP and 150 ppm of TSC was 95%. Polarization study showed thatthe inhibitors inhibit stainless steel corrosion through mixed mode and electrochemical impedance spectroscopy (EIS)results confirm the adsorption of the inhibitors at stainless steel/acid interface. The adsorption of DTPMP and TSC ontothe stainless steel surface was found to follow Langmuir adsorption isotherm modes. Negative values of (ΔGads) in theacid media ensured the spontaneity of the adsorption process. The nature of the protective film formed on the metalsurface has been analyzed by FTIR spectra, SEM and AFM analysis. The activation energy (Ea), free energy change(ΔGads), enthalpy change (ΔHads) and entropy change (ΔSads) were calculated to understand the corrosion inhibitionmechanism.

scholarly journals A Synergistic Effect between Stearic Acid and (+)-α-Tocopherol as a Green Inhibitor on Ferritic Stainless Steel Corrosion Inhibition in 3.0% NaCl Solution

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 971
Author(s):  
Regina Fuchs-Godec
Keyword(s):  
Stainless Steel ◽  
Stearic Acid ◽  
Ferritic Stainless Steel ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Inhibitory Effect ◽  
Low Carbon ◽  
Nacl Solution ◽  
Water Contact ◽  
Green Inhibitor

The synergistic inhibitory effect of stearic acid and (+)-α-tocopherol (E307) as a green inhibitor within a highly hydrophobic layer on the corrosion of low-carbon ferritic stainless steels was investigated in 3.0 wt% NaCl solution at 25 °C, focusing on long-term immersion tests. For a broader characterisation of the surface properties, especially the modified surfaces, of the samples used, the following methods were chosen: SEM was used to investigate the surface morphologies, the water contact angle to examine the wettability, while the corrosion resistance was investigated by potentiodynamic measurements and electrochemical impedance spectroscopy. The inhibition efficiency for modified ferritic stainless steel surfaces reached more than 99% after 1 h of immersion and remained the same after 5 days immersion testing when the surfaces were modified with (SA + 2.0 wt% E307) and more than 97% with (SA + 0.5 wt% E307) under the same test conditions.

scholarly journals Bis-Schiff bases of 2,2′-dibromobenzidine as efficient corrosion inhibitors for mild steel in acidic medium

RSC Advances ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 4499-4511 ◽  
Author(s):  
Ifzan Arshad ◽  
Aamer Saeed ◽  
Pervaiz Ali Channar ◽  
Syeda Aaliya Shehzadi ◽  
Muhammad Naeem Ahmed ◽  
...  
Keyword(s):  
Mild Steel ◽  
Schiff Bases ◽  
Acidic Medium ◽  
Electrochemical Method ◽  
Corrosion Inhibitors ◽  
Steel Corrosion ◽  
Inhibitory Effect ◽  
Mild Steel Corrosion ◽  
Weight Loss Method ◽  
Loss Method

The inhibitory effect of three new bis-Schiff bases on mild steel corrosion in 0.5 M HCl was studied by the weight loss method and the electrochemical method.

Study on Anti-Corrosion Behaviour of 304 Stainless Steel in Circulating Cooling Water

2012 ◽  
Vol 511 ◽  
pp. 74-77
Author(s):  
Yu Chun Li ◽  
Ya Jiang ◽  
Heng Zheng ◽  
Kang Juan ◽  
Xiao Wei Liu
Keyword(s):  
Weight Loss ◽  
Stainless Steel ◽  
Concentration Ratio ◽  
Corrosion Behaviour ◽  
Cooling Water ◽  
304 Stainless Steel ◽  
Circulating Cooling Water ◽  
Weight Loss Method ◽  
Ratio Condition ◽  
Loss Method

Abstract: The corrosion behaviour of 304SS in cooling water was studied through weight-loss method and electrochemistry measurements in different concentration ratio condition. The results obtained from this study showed that 304SS material was anti-corrosive with inhibitor when concentration ratio of circulating cooling water was 3 ~ 10, especially in CR 10 condition, and the advised CR running range was 3~10.

scholarly journals Corrosion Inhibition of Mild Steel in 0.5 M H2SO4 Solution by Plant Extract of Annona squamosa

2021 ◽  
Vol 33 (9) ◽  
pp. 2219-2228
Author(s):  
S. Karthikeyan ◽  
S.S. Syed Abuthahir ◽  
A. Samsath Begum ◽  
K. Vijaya
Keyword(s):  
Mild Steel ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Inhibitory Effect ◽  
Inhibition Mechanism ◽  
H2so4 Solution ◽  
Annona Squamosa ◽  
Mild Steel Corrosion ◽  
Weight Loss Method ◽  
Loss Method

In aqueous solution of 0.5M H2SO4, the Annona Squamosa extract was systematically analyzed to ensure its inhibition mechanism by using potentiodynamics polarization, the weight loss method, and electrochemical impedance spectroscopy (EIS) and its inhibitory effect on mild steel corrosion. For mild steel corrosion in 0.5 M H2SO4 solution, its inhibition efficiency increases and decreases with an increase in its concentration and temperature, respectively. Potentiodynamic polarization analyses revealed that the Annona Squamosa behaves as a cathodic inhibitor. In presence of Annona Squamosa extract in 0.5 M H2SO4 solution, an increase in the activation energy of corrosion leads to a decrease in the rate of mild steel corrosion. On mild steel surfaces, the adsorption behaviour of the extract conformed to the Temkin isotherm, Langmuir isotherm and Arrhenius equation. The EIS results were correlated with the polarization findings. According to atomic force microscopy (AFM) and scanning electron microscopy (SEM), the inhibition of mild steel corrosion proceeds through the adsorption of the extract on the mild steel surface.

scholarly journals Effects of NiSO4 Concentration on the Coloring Performance and Corrosion Resistance of the Colored Film on 304 Stainless Steel

Coatings ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 598
Author(s):  
Wenwei Li ◽  
Jun-e Qu ◽  
Zhiyong Cao ◽  
Hairen Wang
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Electrochemical Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Negative Impact ◽  
304 Stainless Steel ◽  
Nacl Solution ◽  
Time Curve ◽  
Steel Surfaces

The colored films were successfully prepared on the 304 stainless steel surfaces in coloring solutions with different NiSO4 contents. The purpose of this study was to investigate the effects of NiSO4 in the coloring solution on the coloring performance of 304 stainless steel and corrosion resistance of the obtained colored film in NaCl solution. The coloring rate was determined from coloring potential-time curve, and the protection properties of the color films in a 3.5% NaCl solution were characterized by potentiodynamic polarization scan, electrochemical impedance spectroscopy, and wear resistance test. The results showed that adding NiSO4 could accelerate the coloring process but brought about a negative impact on the surface’s corrosion resistance.

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