Coil-coated steel: corrosion resistance and adhesion as a function of the composition of the intermediate galvanic layer

Ferritic stainless steels exhibit properties, such as good electrical conductivity, good corrosion resistance and low cost, that are beneficial for their application as interconnects in intermediate temperature solid oxide fuel cells (ITSOFC) that function at temperatures between 600°C and 800°C. However, the stainless steel corrosion resistance is attributed to the amount of Cr, which is an element that forms a chromium oxide (Cr2O3) layer, acts as an oxidation protective barrier at high temperatures, and reduces the interconnector performance due to its low electrical conductivity. In this context, the objective of this work was to obtain spinel coatings from the Fe and Ni metallic alloy thermal conversion on AISI stainless steel 430 substrate produced by electrodeposition. The morphology and microstructure of the spinel films deposited on stainless steel were characterized by SEM, EDS, XRD and adherence analysis. The results obtained showed that the films were adherent, dense and continuous along the AISI stainless steel 430 substrate surface. In addition, the heat treatment procedure effectively produced crystalline spinels ((NiFe)3O4).

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Evaluation of 316L Stainless Steel Corrosion Resistance in Solution Simulating the Acid Hydrolysis of Biomass

Journal of The Electrochemical Society ◽

10.1149/1.3554728 ◽

2011 ◽

Vol 158 (4) ◽

pp. C95 ◽

Cited By ~ 1

Author(s):

E. A. Ferreira ◽

R. D. Noce ◽

C. S. Fugivara ◽

A. V. Benedetti

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Acid Hydrolysis ◽

316L Stainless Steel ◽

Steel Corrosion ◽

Steel Corrosion Resistance ◽

Hydrolysis Of

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Hybrid nano/micro-particles for Increased Steel Corrosion Resistance: Particles’ Alterations with pH Change and Steel Behavior in Cement Extract and Mortar

MRS Proceedings ◽

10.1557/opl.2013.1126 ◽

2013 ◽

Vol 1612 ◽

Cited By ~ 2

Author(s):

D.A. Koleva ◽

J. Hu ◽

V. Milkova ◽

K. van Breugel

Keyword(s):

Corrosion Resistance ◽

Steel Surface ◽

Steel Corrosion ◽

Alkaline Solutions ◽

Self Healing ◽

Low Carbon ◽

Hybrid Particles ◽

Ph Change ◽

Micro Particles ◽

Steel Corrosion Resistance

ABSTRACTHybrid nano/micro particles were investigated for their possibility to re-structure within local pH alterations, release certain active substance and further contribute to increased steel corrosion resistance. Two aspects with regard to corrosion control and self-healing in cement-based materials are discussed: the first aspect deals with the electrochemical performance of low carbon steel electrodes (St37) in model alkaline solutions (cement extract) in the presence of 4.9.10-4 g/l hybrid particles i.e. cement extract, containing PDADMAC (poly (diallyl, dimethyl ammonium chloride) / PAA (Poly (acrylic acid)/ PDADMAC over a CaO core. The second aspect refers to the performance of reinforcing steel (FeB500 HKN) in mortar specimens, containing hybrid particles in the mixing water in concentration of 3.6×10-4 wt. % per mortar weight. The main objective was to determine if these hybrids will lead to increased corrosion resistance of the steel surface layers, generally formed in the hereby investigated environmental medium (both liquid i.e. cement extract and solid i.e. mortar). Further, it was expected that when chlorides are involved, as corrosion accelerating factor, the presence of hybrid particles will delay corrosion initiation and will therefore lead to increased corrosion resistance. The results denote for indeed superior corrosion performance of steel in chloride-free and chloride containing medium, when hybrid particles are involved. The responsible mechanisms are related to increased barrier effects of the formed layer and self-repair upon morphological alterations of the hybrid particles, “nucleation sites effects” and/or Ca-core “release” on locally active (anodic) areas on the steel surface.

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EFFECT OF HEAT TREATMENT AND PLASMA NITRIDING ON CORROSION RESISTANCE OF 440B MARTENSITIC STAINLESS STEEL

Acta Mechanica et Automatica ◽

10.2478/ama-2013-0026 ◽

2013 ◽

Vol 7 (3) ◽

pp. 155-159 ◽

Cited By ~ 1

Author(s):

Magdalena Łępicka ◽

Małgorzata Grądzka-Dahlke

Keyword(s):

Heat Treatment ◽

Stainless Steel ◽

Corrosion Resistance ◽

Plasma Nitriding ◽

Steel Corrosion ◽

Surgical Instruments ◽

High Wear Resistance ◽

Heat Treated ◽

Conventional Heat Treatment ◽

Steel Corrosion Resistance

Abstract Reliability and durability assurance poses a serious challenge for surgical instruments manufacturers. Hard working conditions, such as intermittent contact with body fluids and hard bone tissues, as well as necessity to undergo frequent sterilisation processes, induce constant research into solutions capable of ensuring high wear resistance while maintaining satisfactory imperviousness to corrosion. Plasma nitriding is marked as the modern corrosion resistance improving method suitable for surgical instruments steels. The paper presents findings from the heat treated and plasma nitrided AISI 440B (PN EN or DIN X90CrMoV18) steel corrosion resistance studies. Three conventionally heat treated (quenched with tempering in 250, 390 or 605°C) and three additionally plasma nitrided in N2:H2 reaction gas mixture (50:50, 35:65 and 20:80 ratio, respectively) specimens groups were examined. Furthermore, the authors evaluated the effect of machining - polishing and sandblasting - on investigated steel corrosion resistance. Microscopic observations and electrochemical corrosion tests were performed using a variety of analytical techniques. Results showed that, in comparison to conventional heat treatment, plasma nitriding of 440B stainless steel does not significantly affect its corrosive characteristics as far as the uniform nitride layer over the entire detail surface is obtained. The layer heterogeneity results in intensification of corrosion processes, making the material even more susceptible to corrosion than after conventional heat treatment, and contributing to severe, visible even with the unaided eye damages development.

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