scholarly journals Comparison of Ni-Based Self-Fluxing Remelted Coatings for Wear and Corrosion Applications

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3293
Author(s):  
Norbert Kazamer ◽  
Roxana Muntean ◽  
Petru Cristian Vălean ◽  
Dragoș Toader Pascal ◽  
Gabriela Mărginean ◽  
...  
Keyword(s):  
Wear Rate ◽  
Corrosion Behavior ◽  
Sliding Wear ◽  
Vacuum Furnace ◽  
Controlled Atmosphere ◽  
Corrosion Resistant ◽  
Post Process ◽  
Porosity Reduction ◽  
Wear And Corrosion ◽  
Corrosion Resistant Coatings

The present study investigates the possibility to apply a vacuum furnace thermal post-treatment as an alternative solution for flame sprayed NiCrBSi wear and corrosion-resistant coatings, deposited on a low alloyed structural steel. The controlled atmosphere offers advantages regarding the fusion of the coating, porosity reduction, and degassing. An improvement of the applied heating-cooling cycle was performed through the variation of time and temperature. The best performing samples were selected by comparing their porosity and roughness values. The chosen samples were subsequently characterized regarding their microstructure, microhardness, sliding wear, and corrosion behavior. The experimental work confirms that the use of a vacuum remelting post-process reduces the porosity below 1% and leads to the formation of a larger quantity of hard boron-containing phases, promoting a significant decrease of the wear rate, while maintaining a good corrosion behavior.

Functional protective coatings of nickel-based alloys

2019 ◽  
pp. 110-114
Author(s):  
D. A. Gerashchenkov ◽  
T. I. Bobkova ◽  
A. F. Vasiliev ◽  
P. A. Kuznetsov ◽  
E. A. Samodelkin ◽  
...  
Keyword(s):  
Environmental Influence ◽  
Protective Coatings ◽  
Cold Gas Dynamic Spraying ◽  
Functional Elements ◽  
Corrosion Resistant ◽  
Gas Dynamic ◽  
Precision Alloy ◽  
Wear And Corrosion ◽  
High Level ◽  
Corrosion Resistant Coatings

A composition of a precision alloy based on the Ni–Cr–Mo system for wear and corrosion-resistant coatings by supersonic cold gas dynamic spraying has been developed. The optimum coatings composition provides high level of operational properties; its application is very promising for protection of structural and functional elements of marine equipment from aggressive environmental influence.

Slurry erosion, sliding wear and corrosion behavior of martensitic stainless steel composites reinforced in-situ with NbC particles

Wear ◽  
2019 ◽  
Vol 420-421 ◽  
pp. 149-162 ◽  
Author(s):  
Wen Hao Kan ◽  
Gwénaëlle Proust ◽  
Vijay Bhatia ◽  
Li Chang ◽  
Kevin Dolman ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Behavior ◽  
Sliding Wear ◽  
Martensitic Stainless Steel ◽  
Slurry Erosion ◽  
Wear And Corrosion

scholarly journals Constitutive Modeling for Prediction of Optimal Process Parameters in Tribo-corrosion Inhibition of Steel Pipes Carrying Fracking Fluid

2021 ◽  
Author(s):  
Jitendra narayan Panda ◽  
Edwin Yanez Orquera ◽  
Brandon Christopher Wong ◽  
Philip Egberts
Keyword(s):  
Wear Rate ◽  
Regression Model ◽  
Corrosion Behavior ◽  
Open Circuit ◽  
Wear Loss ◽  
Total Wear ◽  
Wear And Corrosion ◽  
Geological Formation ◽  
Individual Variables ◽  
The Individual

Abstract The present work examines the effect of three propriety corrosion inhibitors (Dynarate, DWP and CalGuard) on the tribo-corrosion behavior of AISI 4715 steels used to carry fracking liquid from their storage pool to the geological formation. The effect of these three additives on the wear and corrosion behavior of AISI 4715 steel was investigated using a reciprocating tribometer integrated with an open circuit potential electrochemical apparatus. Response Surface Methodology (RSM) was applied to statistically model the effects of various concentrations of Dynarate, DWP andCalGuard on the average coefficient of friction (COF) between the steel and a sapphire counter surface, as well as the total wear loss of the steel due to the combined action of wear-corrosion and inhibition efficiency during sliding. The mathematical regression models were derived from the analysis of variance (ANOVA) techniques. Optimization of the individual variables to minimize the friction and wear responses was estimated using RSM. A full quadratic regression model was established and authenticated before the variables were optimized for different responses. The overall results revealed that Dynarate significantly decreased the COF (0.147) and wear rate (0.3 mm/year) with an inhibitionefficiency of 480% at a concentration of 1%. To investigate the effectiveness of the regression model at predictingthe wear rate, the samples were characterized using 3D optical prolometer and scanning probe microscopy to describe the effect of various additive on the surface morphology of steel. The surface topography measurementsindicated the worn regions for the samples where the Dynarate additive was used was smoother compared with those having the DWP and CalGuard additives. This observation was attributed to the formation of protective lm which limits the transfer of aggressive ions transfer to the steel surface and reduced the total wear loss due to wear and corrosion.

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