The cumulative effect of alloying elements N, W, Mo and Cu on the corrosion behaviour of 17Cr-13Ni stainless steel in 2 N H2SO4

Belfrouh, A.; Masson, Christophe; Vouagner, D.; Becdelievre, A.M. de; Prakash, Natarajan; Audouard, Jean Pierre

doi:10.1016/s0010-938x(96)00033-9

Cited by 47 publications

(24 citation statements)

References 8 publications

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“…Sputtered surfaces were considered for quantitative analysis as the top surface was covered largely with C. Oxide films of Grade 1 and Grade 2 alloys were richer in Cr, Ni, and Cu cations than elements found in the corresponding base alloy (Table 1) Cu differed from the other elements in the sense that it was present in both metallic and oxidized forms. This is in contrast to the results of Belfrough, et al, 29 who reported the presence of only metallic Cu. Hermas, et al, 30 based on energy dispersive analysis of x-rays, proposed the following reactions to occur on the surface, albeit that this technique could not distinguish Cu from its oxidized species:…”

Section: Resultscontrasting

confidence: 99%

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Electron Spectroscopy for Chemical Analysis Study of Corrosion Films Formed on Manganese Stainless Steels

et al. 1999

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Films formed on two grades of Mn stainless steels in 1 M hydrochloric acid (HCl) freely exposed to air at different potentials were examined using electron spectroscopy for chemical analysis (ESCA). The Cr content of the film, which is related closely to corrosion resistance of the base alloys, was lower within the films formed on Mn stainless steels as compared to a normal type 304 (UNS S30400) stainless steels. The film also contained significant amounts of Mn, Ni, and Cu. It was proposed that the presence of higher amounts of Mn, an electrochemically active element, with Cu resulted in poor passivation behavior of the present high Mn stainless steels.

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Section: Resultscontrasting

confidence: 99%

“…[29][30][38][39] In the present case, corrosion films were enriched with Cu. The difference, however, lies in the Cr content of the films.…”

Section: Discussionmentioning

confidence: 47%

Electron Spectroscopy for Chemical Analysis Study of Corrosion Films Formed on Manganese Stainless Steels

et al. 1999

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“…51) The polarization plots showed a wide range of passivation for both WM and Superalloy C-276 and this could be attributed to the presence of Mo and W in the matrix. 52) However, the value of E pit was found to be lower for WM as compared to Superalloy C-276 BM. The lower E pit value of the WM could be attributed to the formation of secondary Mo-rich phases which led to the depletion of Mo and Cr in the matrix (as reported in section 3.3).…”

Section: Corrosion Testmentioning

confidence: 91%

Effect of Pulsed Current Gas Tungsten Arc Process on the Dissimilar Weldments between Nickel-based Superalloy/Austenitic Stainless Steel

2017

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The present work aims at investigating the microstructural and mechanical properties of dissimilar welds between Superalloy C-276 and Grade 321 austenitic stainless steel sheets, fabricated by pulsed current gas tungsten arc welding. The microstructural examination was carried out using an optical microscope and scanning electron microscope (SEM) equipped with energy dispersive spectroscopy. The weld metal microstructures divulged finer equiaxed grains. SEM images revealed migrated grain boundaries adjacent to weld line on both Superalloy C-276 and Grade 321. In addition, the presence of Mo-rich phases was also observed in the weld metal and at the weld interface of Superalloy C-276, which needs further investigation. Mechanical tests were carried out with respect to microhardness, tensile and impact properties. Furthermore, the presence of finer dendritic structure and controlled distribution of elements obtained with PCGTAW contributed for higher corrosion resistance of WM compared to BMs. The results of the present study would help in obtaining high quality dissimilar joints. Moreover, Grade 321 being a low-priced material as compared to Superalloy C-276 would be an economical substitution and would facilitate in saving huge material costs.

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“…The nitrogen contents are 0.03% and 0.19% for normal and modified steels respectively. Clayton and Martin [10] found that passive films formed on alloyed steels contain higher concentration of chromium and molybdenum than comparable steels containing less amount of nitrogen. It was found that the low nitrogen steels had high nickel content to ensure austenitic structure and this reduces corrosion rate.…”

Section: Introductionmentioning

confidence: 99%

Study of Corrosion Behavior of Some Nitrogen Containing Steel Alloys in Hydrochloric Acid Solutions

Singh¹

2017

IJRASET

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Addition of certain alloying elements in steels increase the amount of nitrogen which can be retained on solidification. Addition of nitrogen in austenitic stainless steels can improve their mechanical properties. The increase in nitrogen content along with manganese additions to austenitic steels can balance the decrease in molybdenum and nickel contents of the steels, thus making them cost efficient. Considering the utility and importance of steel alloys, it is very much important to understand the corrosion behavior before using them in industries in the presence of aggressive environments. The study of the systematic investigation and to understand the effect of adding nitrogen and other elements on the dissolution and passivation of stainless steel without molybdenum in hydrochloric acid solutions have been carried out using weight loss and electrochemical techniques. Alloy-2 containing 1087 ppm nitrogen is found to be more resistant to corrosion in HCl solutions than Alloy-1 (853 PPM nitrogen) and Alloy-3 (1447 ppm nitrogen). I.INTRODUCTION Austenitic stainless steels are of very common use in a wide variety of industries especially in chemical and power plant industries. These steels are used for their heat and creep resistance, high ductility and good resistance to general and localized corrosion. Austenitic steels usually contain alloying elements like chromium, nickel and molybdenum, whereas chromium is an unpronounceable alloying element, use of higher nickel content is recommended to improve the resistance to chloride attack and molybdenum is added to get better resistance to pitting corrosion. f certain alloying elements [1] in steels increases the amount of nitrogen which can be retained on solidification. Chromium and manganese have been found to affect the properties of conventional austenitic stainless steel to an appreciable extent. The austenitic stabilization properties of manganese [2] have been utilized in stainless steel. Chromium is an internal part of the austenitic steels whereas manganese additions can be made to vary the nitrogen contents of the steels. They differ from the conventional austenitic stainless steels in a way that manganese has been substituted for part of nickel, thus allowing greater amount of nitrogen to be dissolved in the matrix of the alloy. Incidental levels of nitrogen are normally higher in stainless steels than in low chromium steels because of the effect of chromium on solubility. Deliberate additions can be made to control structure, to increase strength or to delay in the precipitation of carbides and inter metallic phases [3], in the austenitic and martenistic groups. The requirements of increasing the corrosion resistance of stainless steels to acids, chloride media and increasing the levels of toughness and strength can be met by adding chromium, molybdenum and nitrogen in stainless steels. Magdowski et al. [4] found that a high nitrogen high chromium austenitic cold worked steel is resistant to stress corrosion cracking in environments where a ...

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The cumulative effect of alloying elements N, W, Mo and Cu on the corrosion behaviour of 17Cr-13Ni stainless steel in 2 N H2SO4

Cited by 47 publications

References 8 publications

Electron Spectroscopy for Chemical Analysis Study of Corrosion Films Formed on Manganese Stainless Steels

Electron Spectroscopy for Chemical Analysis Study of Corrosion Films Formed on Manganese Stainless Steels

Effect of Pulsed Current Gas Tungsten Arc Process on the Dissimilar Weldments between Nickel-based Superalloy/Austenitic Stainless Steel

Study of Corrosion Behavior of Some Nitrogen Containing Steel Alloys in Hydrochloric Acid Solutions

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