Effect of Organic Corrosion Inhibitors on Corrosion Fatigue

CORROSION ◽  
1967 ◽  
Vol 23 (3) ◽  
pp. 65-71 ◽  
Author(s):  
PARVIZ MEHDIZADEH ◽  
R. L. McGLASSON ◽  
J. E. LANDERS
Keyword(s):  
Corrosion Fatigue ◽  
Diesel Fuel ◽  
Corrosion Inhibitors ◽  
Fatigue Cracks ◽  
Material Surface ◽  
Significant Protection ◽  
Inhibitor Concentration ◽  
Degree Of Protection ◽  
Organic Inhibitors ◽  
Organic Corrosion Inhibitors

Abstract The effect of organic inhibitors on corrosion fatigue performance of steel in a mixture of brine containing H2S-CO2 and diesel fuel is reported. The inhibitor concentration required to give significant protection to steel under corrosion fatigue conditions is much higher than that for corrosion control. This is due to the fact that corrosion fatigue cracks initiated at incompletely protected spots on the material surface influence fatigue failure regardless of the degree of protection achieved on neighboring areas. Effects of fatigue stress and concentration of corrosion inhibitors were investigated. Results were analyzed in terms of the proposed mechanism for corrosion inhibition in these environments.

scholarly journals Effect of Organic Corrosion Inhibitors on Corrosion Fatigue

1967 ◽  
Vol 16 (12) ◽  
pp. 529-534
Author(s):  
P. Mehdizadeh ◽  
R. L. McGlasson ◽  
J. E. Landers
Keyword(s):  
Corrosion Fatigue ◽  
Corrosion Inhibitors ◽  
Organic Corrosion Inhibitors

scholarly journals Utilization of Natural Extracts as Corrosion Inhibitors in the Seawater Environment

2021 ◽  
Vol 16 (2) ◽  
pp. 68-74
Author(s):  
Pocut Nurul Alam ◽  
Cut Meurah Rosnelly ◽  
Justaman Arifin Karo karo ◽  
Akhar Ilhamdi ◽  
Raiyan Soekarno ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Corrosion Inhibitors ◽  
Chloride Ions ◽  
Natural Material ◽  
Soaking Time ◽  
Natural Extracts ◽  
Seawater Environment ◽  
Time Variations ◽  
Organic Inhibitors ◽  
Organic Corrosion Inhibitors

Infrastructures in coastal area are mostly made of metal which is susceptible to corrosion due to direct contact with the seawater. The Seawater greatly affects the corrosion rate of metals because it contains chloride ions which can penetrate metal surface. The process of corrosion can be inhibited or slowed by decreasing the corrosion rate in one way, namely the addition of corrosion inhibitors derived from natural materials containing tannin compounds. This study proposed organic corrosion inhibitors which were derived from natural material extracts (coffee leaves and catappa leaves), the effect of time variations on the efficiency of organic inhibitors was investigated, and the efficiency of each inhibitor organic was compared. The corrosion rate with and without inhibitors was analysed by using the method of weight loss. The results showed that the corrosion rate can be reduced by adding the natural ingredients extract. The addition of 2% concentration coffee leaves extract resulted in the lowest corrosion rate with the addition of 0.00226 mmpy. The addition of catappa leaves extract concentration as much as 2% yield the lowest corrosion rate with the addition of 0.0012 mmpy. The highest efficiency of inhibition system was obtained by using 2% catappa leaves extract at 14 days soaking time at 69.23%, and the lowest by using 1% coffee leaves extract. 

scholarly journals A Review on Plants and Biomass Wastes as Organic Green Corrosion Inhibitors for Mild Steel in Acidic Environment

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1062
Author(s):  
Norbaayah Ahmad Reza ◽  
Nor Hasrul Akhmal ◽  
Nor Akmal Fadil ◽  
Mohd Firdaus Mohd Taib
Keyword(s):  
Acid Solution ◽  
Natural Resources ◽  
Metal Surfaces ◽  
Corrosion Inhibitors ◽  
Acid Corrosion ◽  
Protective Layer ◽  
Acid Environment ◽  
Organic Inhibitors ◽  
Organic Corrosion Inhibitors ◽  
Green Corrosion Inhibitors

Acid corrosion is a problem pertaining to corrosion that involves an acid solution. It is important to treat metal to preserve its integrity. Thus, acids are utilized to clean and treat metal surfaces. In return, this may lead to over-etching and metal degradation. Corrosion inhibitors were introduced as a solution for the issue. However, there are some problems associated with the usage of conventional corrosion inhibitors. Traces of nitrites and chromates that are present in the inhibitors may lead to serious health and environmental issues. As a solution, organic green corrosion inhibitors have been studied to replace the conventional corrosion inhibitors. These inhibitor molecules form a protective layer on top of the metal surface to suppress metal dissolution when added to the acid solution. This process prevents direct contact between the metal surfaces and the acid environment. This study explores the usage of natural resources and biomass wastes as the basis for organic green corrosion inhibitors. This study also provides some suggestions for new biomass wastes that can be studied as new organic corrosion inhibitors, and it is aimed at opening the perspective of researchers on exploring new organic inhibitors by using natural resources and biomass wastes.

scholarly journals NEW CORROSION INHIBITORS BASED ON AMINES AND AMIDES

Globus ◽  
2021 ◽  
Vol 7 (7(64)) ◽  
pp. 41-44
Author(s):  
Alfiya Kurbanbaevna Oserbaeva ◽  
Shavkat Payzievich Nurullaev ◽  
Davron Mavlon o’gl Rashidov ◽  
Ranoxon Islomidin kizi Kurbanova
Keyword(s):  
Sulfuric Acid ◽  
Physicochemical Properties ◽  
Corrosion Inhibitors ◽  
Metal Corrosion ◽  
Organic Substances ◽  
Inhibitor Concentration ◽  
Acid Media ◽  
Salt Deposition ◽  
Organic Inhibitors

In this work, new inhibitors of metal corrosion in sulfuric acid media are investigated depending on the duration of the process, inhibitor concentration and temperature. The main parameters of the synthesis of new corrosion inhibitors for metals of grade St.3 and St.12 with the use of amine and amide-containing organic substances have been determined, and methods for preparing these inhibitors have been described. The physicochemical properties of amine and amide containing organic inhibitors of corrosion and salt deposition in acidic process media have been studied.

Low-Cycle Fatigue Behaviour of Gas Turbine Alloys

1974 ◽  
Vol 188 (1) ◽  
pp. 321-328 ◽  
Author(s):  
W. J. Evans ◽  
G. P. Tilly
Keyword(s):  
Low Cycle Fatigue ◽  
Fatigue Cracks ◽  
High Stress ◽  
Cyclic Creep ◽  
Fatigue Curve ◽  
Fatigue Behaviour ◽  
Material Surface ◽  
Tension Stress ◽  
Cycle Fatigue ◽  
Stress Tests

The low-cycle fatigue characteristics of an 11 per cent chromium steel, two nickel alloys and two titanium alloys have been studied in the range 20° to 500°C. For repeated-tension stress tests on all the materials, there was a sharp break in the stress-endurance curve between 103 and 104 cycles. The high stress failures were attributed to cyclic creep contributing to the development of internal cavities. At lower stresses, failures occurred through the growth of fatigue cracks initiated at the material surface. The whole fatigue curve could be represented by an expression developed from linear damage assumptions. Data for different temperatures and types of stress concentration were correlated by expressing stress as a fraction of the static strength. Repeated-tensile strain cycling data were represented on a stress-endurance diagram and it was shown that they correlated with push-pull stress cycles at high stresses and repeated-tension at low stresses. In general, the compressive phase tended to accentuate cyclic creep so that ductile failures occurred at proportionally lower stresses. Changes in frequency from 1 to 100 cycle/min were shown to have no significant effect on low-cycle fatigue behaviour.

scholarly journals Toward understanding the adsorption mechanism of large size organic corrosion inhibitors on an Fe(110) surface using the DFTB method

RSC Advances ◽  
2017 ◽  
Vol 7 (46) ◽  
pp. 29042-29050 ◽  
Author(s):  
Lei Guo ◽  
Chengwei Qi ◽  
Xingwen Zheng ◽  
Renhui Zhang ◽  
Xun Shen ◽  
...  
Keyword(s):  
Metal Surface ◽  
Corrosion Inhibitors ◽  
Adsorption Mechanism ◽  
Large Size ◽  
Organic Corrosion Inhibitors

Compared with the conventional DFT approach, SCC-DFTB method is more effective to deal with the adsorption issues of large size organic corrosion inhibitors on metal surface.

Performance of Corrosion Inhibitors at High CO2 Pressures

2008 ◽  
Author(s):  
Patchareeporn Sintoorahat ◽  
Aree Wairatpanich ◽  
Suchada Chimam ◽  
Dayin Mongkholkhajornsilp ◽  
Cheolho Kang
Keyword(s):  
Corrosion Inhibitors ◽  
Liquid Velocity ◽  
Flow Characteristics ◽  
Stratified Flow ◽  
Inhibitor Concentration ◽  
Flow Loop ◽  
Corrosion Rates ◽  
Offshore Pipeline ◽  
Carbon Dioxide Pressure ◽  
Corrosion Rate Measurement

The objective of this study was to evaluate the performance of two corrosion inhibitors (CI-A and CI-B) under conditions similar to the second PTT’s offshore pipeline. The experiments were carried out in flow-loop system, 36 m long, 10.16 cm diameter at 10.5 and 14 bar of carbon dioxide pressure, a temperature at 50°C. The performances of corrosion inhibitors were examined under conditions of superficial liquid velocity of 0.03 m/s and gas velocities of 6, 8 and 10 m/s in 0 and 3 degree inclinations using the ER probe and X65 weight-loss coupons for corrosion rate measurement at the top and bottom of pipe. According to flow characteristics, it was found that the smooth and wavy stratified flow occurred in 0 degree. For 3 degree inclination, wavy stratified flow with big waves was dominantly presented for all conditions. Corrosion inhibitor B showed a better performance than inhibitor A in all cases. For inhibitor B, the target corrosion rates of less than 0.1 mm/yr were achieved in all conditions with 50 ppm of inhibitor concentration whereas the amount of 75 ppm inhibitor concentration was required for CI-A. The color, turbidity, and emulsion tendency with corrosion inhibitors will be also discussed in this paper.

Sign in / Sign up

Export Citation Format

Share Document