Research of chromosilicated coatings on compact powder steels

2021 ◽  
pp. 47-50
Author(s):  
S.M. Gadjieva
Keyword(s):  
Chemical Elements ◽  
Diffusion Coating ◽  
Steel Corrosion ◽  
Powder Steel ◽  
The Matrix ◽  
Coating Microstructure ◽  
Steel Corrosion Resistance ◽  
Chemical And Phase Compositions ◽  
Powder Steels ◽  
Matrix Base

Microstructures, chemical and phase compositions of diffusion chromosilicated coatings on powder steels 20, 45, У8 and У10 are investigated. The presence of Cr23C6 and Cr7C3 phases with up to 0,25 % Si is shown in these coatings. The distribution of diffusing chemical elements over the depth of the coating and at the interface with the matrix base is studied. Keywords: diffusion, coating, microstructure, chromosilication, powder steel, corrosion resistance [email protected]

Effect of Chemical Composition and Microstructure Parameters on Carbon and Low-Alloy Steel Corrosion Resistance

Metallurgist ◽  
2018 ◽  
Vol 61 (9-10) ◽  
pp. 770-776
Author(s):  
I. G. Rodionova ◽  
M. V. Feoktistova ◽  
O. N. Baklanova ◽  
A. V. Amezhnov ◽  
D. L. D’yakonov
Keyword(s):  
Corrosion Resistance ◽  
Chemical Composition ◽  
Alloy Steel ◽  
Steel Corrosion ◽  
Low Alloy Steel ◽  
Microstructure Parameters ◽  
Steel Corrosion Resistance

scholarly journals A technique for predicting steel corrosion resistance

2018 ◽  
Vol 289 ◽  
pp. 012013 ◽  
Author(s):  
V F Novikov ◽  
R A Sokolov ◽  
D F Neradovskiy ◽  
K R Muratov
Keyword(s):  
Corrosion Resistance ◽  
Steel Corrosion ◽  
Steel Corrosion Resistance

Steel corrosion resistance in model solutions, containing waste materials

2011 ◽  
Vol 58 ◽  
pp. 628-646 ◽  
Author(s):  
D.A. Koleva ◽  
N. Boshkov ◽  
K. van Breugel ◽  
J.H.W. de Wit
Keyword(s):  
Corrosion Resistance ◽  
Steel Corrosion ◽  
Waste Materials ◽  
Model Solutions ◽  
Steel Corrosion Resistance

Formation of Spinel from Fe-Ni Coating Electrodeposited on AISI 430 Ferritic Stainless Steel

2014 ◽  
Vol 798-799 ◽  
pp. 328-333 ◽  
Author(s):  
Gustavo Alberto Ludwig ◽  
Matias Angelis Korb ◽  
A. Bervian ◽  
C.P. Bergmann ◽  
Célia de Fraga Malfatti
Keyword(s):  
Electrical Conductivity ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Low Cost ◽  
Substrate Surface ◽  
Steel Corrosion ◽  
Thermal Conversion ◽  
Ferritic Stainless Steels ◽  
Steel Corrosion Resistance ◽  
Aisi 430

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).

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

2013 ◽  
Vol 1612 ◽  
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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