Synergistic Effect of Thiourea and Surfactants on Corrosion Inhibition of Stainless Steel-410 in Presence of Sulfuric Acid

2014 ◽  
Vol 699 ◽  
pp. 186-191 ◽  
Author(s):  
Sami Ullah ◽  
Mohd Shariff Azmi ◽  
Muhammad Nadeem ◽  
Mohammad Azmi Bustam ◽  
Shaukat Ali Shahid ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Corrosion Rate ◽  
Corrosion Inhibition ◽  
Sodium Dodecyl ◽  
Ammonium Bromide ◽  
Inhibitor Concentration ◽  
Corrosion Rates ◽  
Inhibition Performance ◽  
Triton X

The inhibition of corrosion of stainless steel (SS)-410 in sulfuric acid using thiourea and three different surfactants, cetyle trimethyl ammonium bromide (CTAB), sodium dodecyl sulfate (SDS) and X-Triton was studied. Corrosion rates were determined by using corrosion coupons. The corrosion rate was found to be decreased with increase in inhibitor concentration. It was observed that the maximum corrosion inhibition occurred in the post micellar concentration of the surfactants. By optimizing the corrosion inhibition performance of different blends of surfactants and thiourea in 3 M H2SO4,the corrosion inhibition order was found as: Triton X-100 + thiourea > CTAB + thiourea > SDS + thiourea. The best results obtained by the addition of 200 ppm thiourea in 500 ppm of Triton X-100 in 3 M H2SO4acid solution. This blend decreased the corrosion rate of SS-410 to 657.66 mpy.

Corrosion Inhibition of Martensitic Stainless Steel in Chloride Medium by Calcium Gluconate-Solanum Tuberosum Extract as Surfactant

2019 ◽  
Vol 796 ◽  
pp. 103-111
Author(s):  
Olaitan Akanji ◽  
Olawale S. Fatoba ◽  
Esther Titilayo Akinlabi
Keyword(s):  
Stainless Steel ◽  
Solanum Tuberosum ◽  
Corrosion Rate ◽  
Corrosion Inhibition ◽  
Calcium Gluconate ◽  
Martensitic Stainless Steel ◽  
Inhibitor Concentration ◽  
Chloride Medium ◽  
Maximum Inhibition ◽  
Inhibition Performance

Corrosion inhibition of martensitic stainless steel (MSS) in magnesium chloride was investigated in the absence and presence of calcium gluconate as corrosion inhibitor at ambient temperature. The effects of inhibitor concentration were studied using weight loss and polarization method. The results obtained showed that calcium gluconate acts as an inhibitor for martensitic stainless steel in MgCl and decreases the corrosion rate. The inhibition performance was found to increase with the increase in inhibitor concentration. The maximum inhibition efficiency obtained was 99 % at 2g/v inhibitor concentration, the adsorption of calcium gluconate on the surface of Martensitic stainless steel was found to obey Langmuir adsorption isotherm. However, the addition of solanum tuberosum extract in the inhibitor decreases the corrosion rate of martesitic steel significantly in chloride solution.

The Synergistic Effect of Thiourea and Surfactants on Corrosion Inhibition of Stainless Steel-316 in Hydrochloric Acid

2014 ◽  
Vol 917 ◽  
pp. 28-34 ◽  
Author(s):  
Sami Ullah ◽  
Muhammad Nadeem ◽  
Mohd Shariff Azmi ◽  
Faiz Ahmad ◽  
Shaukat Ali Shahid ◽  
...  
Keyword(s):  
Weight Loss ◽  
Stainless Steel ◽  
Synergistic Effect ◽  
Corrosion Inhibition ◽  
Raw Materials ◽  
Sodium Dodecyl ◽  
Ammonium Bromide ◽  
Weight Loss Method ◽  
Loss Method ◽  
Stainless Steel 316

Corrosion and scaling are the common problems to all the industries. A remedy of these problems was sought out through chemical treatment: indigenously available raw materials including thiourea, surfactants (cationic, anionic and nonionic containing pre, critical and post micellar concentration). Evaluation of corrosion inhibition properties stainless steel 316 by thiourea based inhibitor and its synergistic effect with cationic cetyl tri-methyl ammonium bromide (CTAB), anionic sodium dodecyl sulphate (SDS) and nonionic triton X-100 have been carried out by weight loss method as a function of concentration of thiourea and surfactants. These materials were applied to the coupons of stainless steel 316 in different acidic concentration. Corrosion rates were calculated using weight loss method. Excellent results were achieved regarding corrosion inhibition in the presence of thiourea and surfactants assuring the better performance of these chemicals. The results showed that corrosion rate was decreased from 90 mpy to 12.1 mpy after 720 hours by the addition of 200ppm thiourea in critical micellar concentration of SDS in 3M HCl acid solution.

Prediction and Measurement of Corrosion Rates of Stainless Steel in Concentrated Sulfuric Acid

CORROSION ◽  
10.5006/0709 ◽  
2013 ◽  
Vol 69 (6) ◽  
pp. 543-550 ◽  
Author(s):  
S. Jones ◽  
K. Coley ◽  
J. Kish
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Corrosion Behavior ◽  
Electrochemical Behavior ◽  
Open Circuit Potential ◽  
Electrochemical Techniques ◽  
Open Circuit ◽  
Corrosion Rates ◽  
Transient Nature ◽  
Concentrated Sulfuric Acid

When exposed to concentrated sulfuric acid, stainless steel exhibits unique electrochemical behavior. This behavior can be observed as an oscillation in open-circuit potential between the active and passive states. The transient nature of the corrosion behavior under these conditions results in a distinct challenge for measuring and predicting corrosion rates. Using a series of commercial alloys with various nickel contents, this paper outlines the utilization of electrochemical experimentation to refine the prediction of corrosion rates. The paper also discusses some of the difficulties associated with many traditional electrochemical techniques such as potentiodynamic scans when used for characterizing systems that undergo oscillations in open-circuit potential.

scholarly journals Corrosion Inhibition of Aluminium in HCl by Amine Modified Epoxy Resin

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Makanjuola Oki ◽  
Kayode Oki ◽  
John Otaigbe ◽  
Samuel Otikor
Keyword(s):  
Corrosion Rate ◽  
Epoxy Resin ◽  
Corrosion Inhibition ◽  
Langmuir Isotherm ◽  
Inhibitor Concentration ◽  
Acid Inhibitor ◽  
Immersion Period ◽  
Butyl Amine ◽  
Modified Epoxy ◽  
Hcl Solution

N-Butyl amine has been grafted unto Dow epoxy resin. The product was evaluated as an acid inhibitor by gravimetric techniques. The reduction in corrosion of aluminium in 1 M HCl solution was 92% at and 83% at with an inhibitor concentration of 100 ppm. The corrosion rate at this concentration was and mm/yr at and . For the specimens in HCl without inhibitor at 10-hour immersion period, the corrosion rate was and mm/yr, respectively, at and . Data obtained correlate with Langmuir isotherm.

scholarly journals The Influence of The Marine Bacillus Cereus Mc-1 Over Carbon Steel, Stainless Corrosion And Copper Coupons

2021 ◽  
Author(s):  
Paulo Moreira-Filho ◽  
Paloma de Paula da Silva Figueiredo ◽  
Artur Capão ◽  
Luciano Procópio
Keyword(s):  
Stainless Steel ◽  
Control System ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Bacillus Cereus ◽  
Copper Alloy ◽  
Culture Medium ◽  
316L Stainless Steel ◽  
Corrosion Rates ◽  
Nitrate Supplementation

Abstract The present study evaluated the influence of the marine bacteria Bacillus cereus Mc-1 on the corrosion of 1020 carbon steel, 316L stainless steel, and copper alloy. The Mc-1 strain was grown in a modified ammoniacal citrate culture medium (CFA.ico-), CFA.ico- with sodium nitrate supplementation (NO3-), and CFA.ico- with sodium chloride supplementation (NaCl). The and mass loss and corrosion rate were evaluated after the periods of seven, 15, and 30 days. The results showed that in CFA.ico- and CFA.ico- medium added NO3- the corrosion rates of carbon steel and copper alloy were high when compared to the control. Whereas the medium was supplemented with NaCl, despite the rates being above the averages of the control system, they were considerably below the previous results. In general, the corrosion rates induced by Mc-1 on 316L coupons were below the results compared to carbon steel and copper alloy. When analyzing the corrosion rate measurements, regardless of the culture medium, the corrosion levels decreased consistently after 15 days, being below the levels evaluated after seven days of the experiment. Our analyzes suggest that B. cereus Mc-1 has different influences on corrosion in different metals and environmental conditions, such as the presence of NO3- and NaCl. These results can help to better understand the influence of this bacteria genus on the corrosion of metals in marine environments.

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