Corrosion Behaviour of Nitronic Steel in Acidic Environment

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Himanshu Sharma ◽  
Anurag Bhardwaj ◽  
Daljeet Singh ◽  
Divyansh Mittal ◽  
Rajiv Kumar ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Corrosion Behaviour ◽  
Steel Corrosion ◽  
Optical Microscope ◽  
Acidic Environment ◽  
Acidic Solutions ◽  
Corrosion Studies ◽  
Structural Applications ◽  
Lower Corrosion Rate

Nitronic steel exhibits an austenitic matrix with carbide precipitates along the grain boundaries. The nitronic steel also shows excellent ductility (nearly 2 times of the other stainless steel) which enhances their structural applications. In the view of the performance of nitrogen alloyed steel, the corrosion behaviour of the as-received nitronic steels wasstudied and compared its corrosion behaviour with the conventional stainless steels being used in chemical and hydropower industries. The corrosion study of the nitronic steel and conventional stainless steels was performed in different aqueous solutions (H2SO4 and NaCl). The results obtained from corrosion studies suggest the lower corrosion rate of nitronic steel as compared to the conventional stainless steels. The corroded surfaces were analyzed using an optical microscope and scanning electron microscope for the elemental analysis of corrosion products. Keywords: Nitronic steel; Corrosion; Stainless steel; Acidic solutions

AISI No. 633

Alloy Digest ◽  
1981 ◽  
Vol 30 (7) ◽  
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Stainless Steels ◽  
High Strength ◽  
Heat Treating ◽  
Corrosion Resistant ◽  
Martensitic Stainless Steels ◽  
Steel Mills ◽  
Temperature Performance ◽  
Structural Applications

Abstract AISI No. 633 is a chromium-nickel-molybdenum stainless steel whose properties can be changed by heat treatment. It bridges the gap between the austenitic and martensitic stainless steels; that is, it has some of the properties of each. Its uses include high-strength structural applications, corrosion-resistant springs and knife blades. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-389. Producer or source: Stainless steel mills.

Leaching of Am-241 from a Radioactive Waste Glass Corroded in the Presence of Stainless Steel Corrosion Products and/or Bentonite

1987 ◽  
Vol 112 ◽  
Author(s):  
Masaki Tsukamoto ◽  
Inga-Kari Björner ◽  
Hilbert Christensen ◽  
Hans-Peter Hermansson ◽  
Lars Werme
Keyword(s):  
Stainless Steel ◽  
Radioactive Waste ◽  
Mass Loss ◽  
Total Mass ◽  
Corrosion Behaviour ◽  
Steel Corrosion ◽  
Waste Glass ◽  
Corrosion Products ◽  
Total Mass Loss ◽  
Elemental Mass

AbstractThe release of Am-241 during corrosion of the radioactive waste glass, JSS-A, has been studied in the presence of corrosion products and/or uncom-pacted bentonite. The corrosion behaviour of Am-241 has been analyzed using gamma spectrometry. Adsorption of Am-241 on bentonite is observed in all cases. The contents of Am-241 in centrifuged leachates are in most cases less than 1/100 of total values. The normalized elemental mass loss of Am increases initially with corrosion time, and the values in the presence of bentonite and corrosion products are larger than those in the presence of bentonite alone. This tendency is in agreement with results previously found for other elements. The release of Am is low, only about 10–20 % of the corresponding total mass loss.

scholarly journals The effect of SO3-Ph-BTBP on stainless steel corrosion in nitric acid

Nukleonika ◽  
2015 ◽  
Vol 60 (4) ◽  
pp. 865-869
Author(s):  
Richard J. Wilbraham ◽  
Colin Boxall
Keyword(s):  
Stainless Steel ◽  
Nitric Acid ◽  
Stainless Steels ◽  
Steel Corrosion ◽  
Reductive Dissolution ◽  
Extraction Kinetics ◽  
Weak Absorption ◽  
Solution Interface ◽  
Nuclear Reprocessing ◽  
Kinetics Of

Abstract SO3-Ph-BTBP is a hydrophilic tetra-N-dentate ligand proposed for An(III)/Ln(III) separation by solvent extraction, and a candidate for use in future advanced reprocessing schemes such as GANEX and SANEX. We present the first study of the effect of SO3-Ph-BTBP on the corrosion behavior of stainless steels. Specifically, studies have been performed using steels and conditions equivalent to those found in relevant nuclear reprocessing flow sheets. SO3-Ph-BTBP has been shown to have little effect on either steel passivation or reductive dissolution. However, if driven cathodically into a region of hydrogen evolution at the electrode surface or conversely anodically into a region of transpassive dissolution, observed currents are reduced in the presence of SO3-Ph-BTBP, suggesting corrosion inhibition of the steel potentially through weak absorption of a SO3-Ph-BTBP layer at the metal-solution interface. The lack of any observed corrosion acceleration via complexation of Fe3+ is surprising and has been suggested to be due to the slow extraction kinetics of SO3-Ph-BTBP as a result of a requirement for a trans- to cis-conformational change before binding.

scholarly journals Development of new approaches to the study of pitting corrosion resistance of stainless steels obtained by selective laser melting

2019 ◽  
Vol 121 ◽  
pp. 01011
Author(s):  
Olga Parmenova ◽  
Svetlana Mushnikova ◽  
Vitaliy Bobyr ◽  
Evgeniy Samodelkin
Keyword(s):  
Corrosion Resistance ◽  
Selective Laser Melting ◽  
Pitting Corrosion ◽  
Stainless Steels ◽  
Laser Scanning ◽  
Corrosion Behaviour ◽  
Steel Corrosion ◽  
Scanning Speed ◽  
Laser Melting ◽  
Initial State

This paper presents the results of comparative corrosion resistance studies of stainless steels manufactured by selective laser melting (SLM) in the initial state with subsequent heat treatment and machining. Pitting corrosion tests are carried out, according to ASTM G48 method A in 10% FeCl3·6H2O solution at elevated temperature and exposure time for 5h. The studies were performed on the AISI 321 and AISI 316L stainless steels manufactured by SLM. It was obtained that laser scanning speed decrease led to density rise by other SLM parameters being equal. Porosity affected to the stainless steel corrosion behaviour significant. Metal density decrease resulted to corrosion rate rise. Microstructure examination showed that pitting corrosion development depended on surface steel condition.

scholarly journals Influence of temperature on corrosion resistance of austenitic stainless steel in cl− containing solutions

2019 ◽  
Vol 25 (25) ◽  
pp. 43-46
Author(s):  
Viera Zatkalíková ◽  
Lenka Markovičová
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Stainless Steels ◽  
External Factor ◽  
Corrosion Behaviour ◽  
Local Damage ◽  
Corrosion Attack ◽  
Temperature Changes ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

Abstract Temperature is considered a complicated external factor of the susceptibility of stainless steels to the pitting. This paper deals with the corrosion behaviour of AISI 316Ti stainless steel in temperature range 22 - 80°C in aggressive chloride environments (3 and 5% FeCl3 solutions). The corrosion resistance of tested steel is evaluated on the base of results of exposure immersion tests and cyclic potentiodynamic tests. According to the obtained results the resistance of AISI 316Ti to the pitting is markedly affected by temperature changes in the range 22 – 80°C. Intensity of corrosion attack increases with the rise of Cl− concentration. Gentle changes of temperature and Cl− concentration cause significant differences in character of local damage. The appearance of pitted surfaces changes with the rise of the temperature (a density of pitting increases, a size of pits decreases). The strongest change in appearance is observed between 40 and 50ºC.

scholarly journals Surface Treatment Proposals for the Automotive Industry by the Example of 316L Steel

2018 ◽  
Vol 1 (1) ◽  
pp. 369-376 ◽  
Author(s):  
Agata Dudek ◽  
Barbara Lisiecka
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Scratch Test ◽  
Optical Microscope ◽  
Atmospheric Plasma ◽  
Stainless Steel Surface ◽  
Industrial Sectors ◽  
Steel Modification ◽  
316L Steel ◽  
Sintered Stainless Steel

Abstract Nowadays, stainless steels are very interesting and promising materials with unique properties. They are characterized high mechanical strengths, high toughness and good corrosion resistance, so that can be used in many industrial sectors. An interesting alternative to steels obtained using the conventional methods is sintered stainless steel manufactured using the powder metallurgy technology. AISI 316L stainless steel is one of the best-known and widely used austenitic stainless steel. Modification of surface properties of stainless steels, in particular by applying the Cr3C2 coating is becoming more and more popular. The technique of atmospheric plasma spraying (APS) was used to deposit Cr3C2 - NiAl powder on stainless steel surface. In this study presents arc surface remelting of two types of stainless steel was used by GTAW method in order to improve function and usability these materials. The results of optical microscope metallographic, hardness and scratch test are presented. The main assumption for this study was to analyze the microstructure and hardness after remelting and alloying the surface of 316L steel (using GTAW method) with current intensity 50 A.

scholarly journals CORROSION BEHAVIOUR OF AISI 460LI SUPER-FERRITIC STAINLESS STEEL

2019 ◽  
Vol 25 (4) ◽  
pp. 217
Author(s):  
Andrea Di Schino
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Ferritic Stainless Steel ◽  
Stainless Steels ◽  
Corrosion Behaviour ◽  
Ferritic Stainless Steels ◽  
Ferritic Alloys ◽  
Cr Content ◽  
Super Ferritic Stainless Steel ◽  
Steel Market

<p class="AMSmaintext1"><span lang="EN-GB">Following nickel and molybdenum significant price increase, nowadays the stainless steel market is moving toward an increasing use of ferritic stainless steel instead of austenitic stainless and therefore to the development of advanced ferritic stainless steels grades aimed to substitute the more expensive austenitic materials in all applications allowing it. Super-ferritic stainless steels are higher chromium (Cr) and molybdenum (Mo) steels with properties similar to those of standard ferritic alloys. Such elements increase high temperature and corrosion resistance in strong environment. This paper deal about the corrosion resistance of super-ferritic stainless steels with a Cr content ranging from 21% to 24%. </span></p>

Effects of Nickel and Chromium Additions on Microstructure of P/M 316L Stainless Steels

2017 ◽  
Vol 891 ◽  
pp. 452-457
Author(s):  
Seksak Asavavisithchai ◽  
Panyawat Wangyao ◽  
Fonthip Tangmon ◽  
Pipat Tangsatapornpad
Keyword(s):  
High Pressure ◽  
Stainless Steel ◽  
Oxidation Resistance ◽  
Working Conditions ◽  
Stainless Steels ◽  
Sintering Temperature ◽  
Optical Microscope ◽  
Hydrogen Atmosphere ◽  
Microstructural Development ◽  
Σ Phase

The present study aims to investigate the effects of Ni and Cr additions on microstructure of P/M 316L stainless steels. The optimum content of both elements to maximize the oxidation resistance of the stainless steel with minimum σ phase formation and microstructural development in various sintering times are also examined. The 316L samples were produced by homogeneously mixing Ni and Cr powders in various contents, followed by cold compaction at high pressure for 30 s. The solutioning process was performed at 1300°C for 45 s under hydrogen atmosphere. The sintering temperature was at 800°C and the sintering times were selected at 200, 400 and 600 hrs, in order to simulate working conditions. The development of microstructure was examined through optical microscope. It is found that the addition of Ni and Cr resulted in the formation of different porosity contents. The porosity increases when the content of the powders increases.

Duplex stainless steels: sustainable materials for highly durable structures

2019 ◽  
Author(s):  
Andrew Backhouse ◽  
Sukanya Hägg Mameng
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Structural Engineering ◽  
High Strength ◽  
Duplex Stainless Steels ◽  
Atmospheric Conditions ◽  
Structural Applications ◽  
Sustainable Materials ◽  
Street Furniture ◽  
Duplex Steels

<p>Stainless steels are well known for their durability in the built environment, having been widely used in external building cladding, street furniture and public artworks; the 1930’s stainless steel roof of the Chrysler Building is a fine example. Modern steelmaking techniques have facilitated the production of stainless steels with 85% recycled content and the production of high strength duplex stainless steels. High strength minimizes the weight of steel required and the inherent corrosion resistance means there is no need for additional corrosion protection even in aggressive coastal environments. These properties allow duplex steels to be efficiently used as durable structural engineering materials. The corrosion performance of several stainless steels, including a newly developed duplex grade LDX2404 (EN1.4662/UNS82441) has been studied in coastal atmospheric conditions. The performance of stainless steels under these test conditions is found to be similar to the performance in existing structural applications in comparable real-world environments. It is observed that the performance of a stainless steel grade can be adequately assessed in a given environment after only a few months or years, as the onset of any detrimental corrosion effects become visibly evident rather quickly. Appropriately selected grades of stainless steel for a given environment can be fully resistant to corrosion effects, and thus can be considered highly durable materials for bridges and other structural uses in the external environment.</p>

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