The effect of molybdenum on corrosion of low-temperature nitrided stainless steels in sulphate–chloride solution

Flis, J.; Kuczynska-Wydorska, M.; Flis-Kabulska, I.

doi:10.1007/s10008-006-0112-4

Cited by 15 publications

(13 citation statements)

References 35 publications

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“…Slight current oscillations suggested that only metastable pits were formed. 39 For all the steels, anodic currents after nitriding are higher than those for unnitrided steels (disregarding currents above E p ). This may suggest that the high resistance to pitting of low-temperature nitrided steels might be in some way associated with their increased general reactivity.…”

Section: Corrosion In Chloride Containing Solutionsmentioning

confidence: 95%

“…Figure 10 shows anodic curves for unnitrided and nitrided stainless steels in the chloride containing solution of pH 3?0. 39 For unnitrided 304L steel, anodic current rose steeply after passing potential E p , indicating the occurrence of pitting corrosion. For nitrided steel, the pitting potential E p was shifted to a much nobler potential, manifesting higher resistance to the localised corrosion.…”

Section: Corrosion In Chloride Containing Solutionsmentioning

confidence: 95%

“…Still higher resistance was exhibited by nitrided 316L steel (not shown here) -this steel did not undergo pitting corrosion in the entire potential range. 39 Unlike 304L and 316L steels, steels with high contents of molybdenum (904L steel with 4?5 wt-%Mo and 254 SMO steel with 6?1 wt-%Mo) became after nitriding less resistant to chloride anions. Figure 10 shows that anodic currents for the nitrided steels were higher than those for unnitrided ones.…”

Section: Corrosion In Chloride Containing Solutionsmentioning

confidence: 99%

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Corrosion and passivation of plasma nitrided stainless steels

Flis

2010

Surface Engineering

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Corrosion behaviour of nitrided steels was examined in chloride free and chloride containing sulphate solutions acidified to pH 3?0. Conventional nitriding (550-600uC) strongly deteriorates the corrosion resistance, however, high reactivity of nitrided layers enables the formation of thick conversion coatings to protect against corrosion (oxidation and phosphating) or to improve lubrication (phosphating). Low-temperature nitriding (380-450uC) produces thin layers of a supersaturated solid solution of nitrogen in austenite (S phase) of high resistance to pitting corrosion in chloride containing solutions. After nitriding at 450uC for 30 h, the near-surface parts of layers with .7 wt-%N have a deteriorated resistance to general corrosion in the acidified solution, but deeper parts with lower nitrogen contents have the resistance comparable with that of untreated steels. It is proposed that the improved pitting resistance is due mainly to the accumulation on corroding surface of large amounts of passivating products and of Cr-N species.

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Section: Corrosion In Chloride Containing Solutionsmentioning

confidence: 95%

Section: Corrosion In Chloride Containing Solutionsmentioning

confidence: 95%

Section: Corrosion In Chloride Containing Solutionsmentioning

confidence: 99%

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Corrosion and passivation of plasma nitrided stainless steels

Flis

2010

Surface Engineering

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“…Dodatkowo wszelkie zakłócenia czynności sekrecyjnych gruczołów i narządów rozrodczych u samców z rodziny Zróżnicowanie masy ciała i masy jąder oraz jakości nasienia samców saren pochodzących z Wyżyny Lubelskiej w sezonie reprodukcyjnym jeleniowatych wywierają negatywny wpływ na przebieg corocznego cyklu nakładania i zrzucania poroży, będącego drugorzędową cechą płciową. Zakłócenia te przyczyniają się do powstawania form myłkusowatych, jak również do wykształcania form perukarza (1,2,6,7,9,17,18). Według badań różnych autorów, najlepsza jakość nasienia powinna występować w szczytowym okresie rui, co gwarantuje sukces reprodukcyjny.…”

Section: Praca Oryginalnaunclassified

Differentiation in body and testes weight as well as sperm quality of male roe deer from the Lublin Upland in the reproductive season

Flis

Wrona

Nozdryn-Płotnicki

2017

Medycyna Weterynaryjna

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Flis M., Wrona Z., Nozdryn-Płotnicki Z.Differentiation in body and testes weight as well as sperm quality of male roe deer from the Lublin Upland in the reproductive season Summary The aim of the study was to evaluate the morphology structure of sperm cells and quality of individual male deer obtained in the Lublin Upland during the 2015/2016 hunting season. The comparison included two separate periods of the hunting season resulting from varying physiological processes related to the estrus period of this species. In the first study with regards to the estrus period, males were characterized by an average of 1.6 grams less testicle weight, while body weight was 1.9 kg higher. Increasing the mass of the testicles in the reproductive season proceeded simultaneously with the increase in the share of properly developed sperm cells to the level of 70.6%. During the pre-estrus period, the percentage of spermatozoids with main and secondary defects accounted for almost 60%. Between the compared periods, an approximately 6.8% body weight loss occurred. The highest percentage of properly developed spermatozoids was present in deer aged 4 and 5 years. Regarding the greatest body weight loss in these two age groups, it is indicated that this age is the climax in terms of potential accession to the breeding and effective mating of females and the possibility of fertilization. Analysis of the relationship between body weight and testicle weight showed low and statistically insignificant correlation coefficients (r xy = 0.331-0.393) between those features.

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“…The largest part of stainless steel equipment failure are caused by chloride ions, particularly in cooling water systems the pitting and crevice corrosion are still the serious problems of stainless steel 3 . Surface treatment procedures such as electro polishing, low temperature nitridization and passivation have been used to enhance the resistivity of the metals [4][5][6][7] .The increasing application of the RESEARCH ARTICLE stainless steel to improve efficient and environmentally complicated method, corrosion and either inhibitors or conducting polymer coating [8][9][10][11][12] . In recent times, conducting polymers have received considerable attention as corrosion protective coatings for oxidizable metals.…”

Section: Introductionmentioning

confidence: 99%

Anti-Corrosion Application of Poly(indole-5-carboxylic Acid) Coating on Low Nickel Stainless Steel in Acidic Medium

2016

Chem Sci Trans

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Poly(indole-5-carboxylic acid) (PICA) has been synthesized by electrochemical polymerization technique from different concentration of poly(indole-5-carboxylic acid) using lithium per chloride as oxidation agent at different scan rate. The as-synthesized PICA was characterized using Fourier transform infrared spectroscopy (FT-IR) and Proton nuclear magnetic resonance spectroscopy ( 1 H-NMR). Thermal analysis of the PICA was performed by Thermo gravimetric analysis (TGA). The corrosion protection performance of low nickel stainless steel (LN SS) specimens coated with 0.1 M concentration of PICA was investigated in 0.5 M H 2 SO 4 medium using potentiodynamic polarization and electrochemical impedance spectroscopic (EIS) methods. The morphological properties of the polymer were characterized by scanning electron microscopy (SEM). The as-synthesized PICA has been used in order to achieve adherent, as well as environmentally preferential good anti-corrosive coating. Electrochemical corrosion tests and surface analysis results evidently showed that PICA coating served as a stable mass matrix on LN SS against corrosion. It was also revealed that the coating of PICA at 0.1V scan rate with 0.1M indole-5-carboxylic acid exhibited the best corrosion resistance among all concentrations.

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The effect of molybdenum on corrosion of low-temperature nitrided stainless steels in sulphate–chloride solution

Cited by 15 publications

References 35 publications

Corrosion and passivation of plasma nitrided stainless steels

Corrosion and passivation of plasma nitrided stainless steels

Differentiation in body and testes weight as well as sperm quality of male roe deer from the Lublin Upland in the reproductive season

Anti-Corrosion Application of Poly(indole-5-carboxylic Acid) Coating on Low Nickel Stainless Steel in Acidic Medium

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