Corrosion behaviour of austenitic stainless steels in phosphate buffer saline solution: synergistic effects of protein concentration, time and nitrogen

2019 ◽  
Vol 43 (4) ◽  
pp. 1943-1955 ◽  
Author(s):  
Mohd Talha ◽  
Yucong Ma ◽  
Yuanhua Lin ◽  
Ambrish Singh ◽  
Wanying Liu ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Stainless Steels ◽  
Protein Concentration ◽  
Saline Solution ◽  
Protein Complexes ◽  
Corrosion Behaviour ◽  
Synergistic Effects ◽  
Austenitic Stainless Steels ◽  
Phosphate Buffer Saline Solution ◽  
Concentration Time

Adsorption of protein on a steel surface decreases the corrosion rate, while the formation of metal–protein complexes followed by detachment enhances the corrosion rate.

Correlation between PIII nitriding parameters and corrosion behaviour of austenitic stainless steels

2005 ◽  
Vol 200 (1-4) ◽  
pp. 104-108 ◽  
Author(s):  
S. Mändl ◽  
D. Manova ◽  
H. Neumann ◽  
M.T. Pham ◽  
E. Richter ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Corrosion Behaviour ◽  
Austenitic Stainless Steels

scholarly journals Comparison of Corrosion Resistance in Physiological Saline Solution of Two Austenitic Stainless Steels – 316LV and REX734

2017 ◽  
Vol 11 (2) ◽  
pp. 91-95 ◽  
Author(s):  
Eliza Romańczuk ◽  
Zbigniew Oksiuta
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
Saline Solution ◽  
Austenitic Stainless Steels ◽  
Physiological Saline ◽  
Nacl Solution ◽  
Corrosion Properties ◽  
Physiological Saline Solution ◽  
Superior Corrosion Resistance ◽  
Lower Nickel

AbstractIn this work two austenitic stainless steels, REX734 and 316LV were tested in terms of their microstructure and corrosion properties. The REX734 is a newer generation stainless steel, with modified chemical composition, in comparison to the 316LV grade. Potentiodynamic study of corrosion resistance was conducted in physiological saline solution (0.9% NaCl solution). In spite of the similarities of microstructure, grain size and phase structure in both materials, the corrosion tests revealed that the REX734, with lower nickel and higher nitrogen content, had better corrosion resistance than 316LV. Repassivation potential in the REX734 was almost six times higher than for the 316LV steel. Superior corrosion resistance of the REX734 steel was also confirmed by surface observations of both materials, since bigger and more densely distributed pits were detected in 316LV alloy.

Influence of Impurities on Intergranular Corrosion of Extra High Purity Austenitic Stainless Steels

2009 ◽  
Author(s):  
Ikuo Ioka ◽  
Jun Suzuki ◽  
Takafumi Motoka ◽  
Kiyoshi Kiuchi ◽  
Junpei Nakayama
Keyword(s):  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Stainless Steels ◽  
High Purity ◽  
Intergranular Corrosion ◽  
Active Sites ◽  
Degradation Mechanism ◽  
Austenitic Stainless Steels ◽  
Hno3 Solution ◽  
Nuclear Fuel Reprocessing Plant

An intergranular corrosion is observed in austenitic stainless steels exposed to high temperature, concentrated nitric acid (HNO3) solution with highly oxidizing ions. It is an important degradation mechanism of austenitic stainless steels for use in a nuclear fuel reprocessing plant. The intergranular corrosion is caused by the segregation of impurities to grain boundaries and the resultant formation of active sites. Extra High Purity (EHP™) austenitic stainless steel was developed with conducting the new multiple refined melting in order to suppress the total harmful impurities less than 100ppm. The intergranular corrosion behavior of EHP alloys with various impurities was examined in boiling HNO3 solution with highly oxidizing ions to find a correlation between the intergranular corrosion and the impurities of EHP alloys. A good correlation was confirmed between the degree of intergranular corrosion and the corrosion rate. The relationships between the corrosion rate and the impurities content of EHP alloys was determined using a multiple regression analysis. The influence on corrosion rate became small in order of B, P, Si, C, S and Mn. It was important to control B in intergranular corrosion behavior of EHP alloys.

Modeling and Quantitative Prediction of Environmentally Assisted Cracking Based Upon a Deformation-Oxidation Mechanism

2004 ◽  
Author(s):  
Tetsuo Shoji ◽  
Zhanpeng Lu ◽  
Qunjia Peng ◽  
Shengchun Wang ◽  
Yoichi Takeda ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Synergistic Effects ◽  
Crack Tip ◽  
Oxidation Mechanism ◽  
Austenitic Stainless Steels ◽  
Quantitative Prediction ◽  
Future Directions ◽  
Environmentally Assisted Cracking ◽  
Austenitic Alloys ◽  
Quantitative Tool

In order to provide a quantitative tool for predicting EAC growth rates for austenitic alloys such as austenitic stainless steels, Alloys 600 and 182 in simulated LWR environments, a model based upon the synergistic effects of deformation and oxidation at the crack tip has been proposed. In this paper, the effects of hardening, variation of K with crack growth and oxidation kinetics on EAC growth rate are described with special emphasis on field applications. The results imply recent cracking incidences in BWR core shroud and Primary Loop Recirculation (PLR) piping and PWR Vessel Penetrations (VP). In particular, the significance of oxide analysis at the crack tip and also of a kinetic approach to oxidation under stress or strain condition is described. Potential future directions for mitigation of such cracking are discussed.

Investigation of the Corrosion Behaviour of Welded Area of Austenitic Stainless Steels under Stress

2018 ◽  
Vol 9 (4) ◽  
pp. 135-138
Author(s):  
Yehia Youssef ◽  
◽  
Walaa El Bestawy ◽  
Mootaz Ghazy ◽  
Mohamed Shehadeh ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Corrosion Behaviour ◽  
Austenitic Stainless Steels
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