scholarly journals Effect of combined surface treatment on quality and electrochemical corrosion properties of manganese phosphate on hsla steel domex 700

2018 ◽  
Vol 62 (2) ◽  
pp. 45-53 ◽  
Author(s):  
Kamil Borko ◽  
F. Pastorek ◽  
Jacková M. Neslušan ◽  
S. Fintová ◽  
B. Hadzima
Keyword(s):  
Corrosion Resistance ◽  
Surface Treatment ◽  
Electrochemical Impedance ◽  
Hsla Steel ◽  
Electrochemical Corrosion ◽  
High Strength Steels ◽  
High Strength ◽  
Corrosion Properties ◽  
Manganese Phosphate ◽  
Pre Treatment

Abstract The actual industrial trend is focused on weight reduction of constructions while preserving strength properties. For this purpose, conventional steel are replaced by high strength steels.. The aim of this study was to evaluate the effects of mechanical surface pre-treatment on corrosion resistance of high strength low alloy steel Domex 700 before and after surface treatment by manganese phosphating. Tested environment was 0,1M NaCl solution. Evaluation of mechanical pre-treatment and phosphating effects on corrosion resistance was realized by electrochemical measurements: potentiodynamic polarization measurements (Tafel analysis) and electrochemical impedance spectroscopy (equivalent circuits). From resulsts it is possible to conclude, that creation of manganese phosphate layer on ground and shot peened steel surface significantly increases the corrosion resistance of Domex 700 steel.

scholarly journals Effect of Phosphating Temperature on Surface Properties of Manganese Phosphate Coating on HSLA Steel

2020 ◽  
Vol 22 (1) ◽  
pp. 55-61
Author(s):  
Jana Pastorkova ◽  
Martina Jackova ◽  
Filip Pastorek ◽  
Zuzana Florkova ◽  
Juliana Drabikova
Keyword(s):  
Surface Properties ◽  
Electrochemical Impedance ◽  
Hsla Steel ◽  
Electrochemical Corrosion ◽  
High Strength ◽  
Phosphate Coating ◽  
Nacl Solution ◽  
Optimal Temperature ◽  
Manganese Phosphate ◽  
Photo Documentation

A phosphating process modified for a high-strength low-alloy (HSLA) steel was performed at various temperatures and influence on the surface properties of the Domex steel covered by manganese phosphate (MnP) was investigated by electrochemical corrosion tests supported by a photo documentation performed by the SEM. Corrosion measurements were performed in 0.1M NaCl solution at 22±2 °C using electrochemical impedance spectroscopy and potentio-dynamic polarisation in order to obtain thermodynamic and kinetic corrosion characteristics and individual elements of equivalent circuits. It is that a temperature of the phosphating process has a very significant effect on protection properties of the created manganese phosphate coating on the Domex steel and needs to be strictly monitored. According to results of corrosion testing and surface morphology observations, the optimal temperature for the phosphating process on the tested Domex steel was chosen.

scholarly journals Effect of Surface Pretreatment on Quality and Electrochemical Corrosion Properties of Manganese Phosphate on S355J2 HSLA Steel

Coatings ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 46 ◽  
Author(s):  
Filip Pastorek ◽  
Kamil Borko ◽  
Stanislava Fintová ◽  
Daniel Kajánek ◽  
Branislav Hadzima
Keyword(s):  
Hsla Steel ◽  
Electrochemical Corrosion ◽  
Corrosion Properties ◽  
Surface Pretreatment ◽  
Manganese Phosphate ◽  
Effect Of Surface

Investigation in the Influence of Surface Treatment on Mechanical and Electrochemical Corrosion Properties of Ti-6Al-4V Alloy

2017 ◽  
Vol 893 ◽  
pp. 350-353 ◽  
Author(s):  
Zhe Rui Huang ◽  
Yu Lin Li ◽  
Qing Dong Zhong ◽  
Chen Xiao ◽  
Hui Li ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Surface Treatment ◽  
Electrochemical Corrosion ◽  
Compound Layer ◽  
Cell Reaction ◽  
Corrosion Properties ◽  
Layer Sample ◽  
Two Phases

Potential difference between two phases in the Ti-6Al-4V alloy results in the galvanic cell reaction and corrosion. In order to improve the properties of Ti-6Al-4V, it was treated under different temperature with the atmosphere of 5vol. % oxygen and 95 vol. % nitrogen. The results showed that the titanium alloy surface is formed a layer of oxide and nitride compound layer. Sample treated at the temperature of 800°C had the most outstanding corrosion resistance and mechanical property.

scholarly journals Effect of Rare-Earth Elements on the Corrosion Resistance of Flux-Cored Arc-Welded Metal with 10CrNi3MoV Steel

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Kai Wang ◽  
Qinghua Lu ◽  
Zexin Jiang ◽  
Yaoyong Yi ◽  
Jianglong Yi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Electrochemical Impedance ◽  
Hsla Steel ◽  
High Strength ◽  
Cored Wire ◽  
Uniform Microstructure ◽  
Mechanical Properties And Corrosion

We modified the content of rare-earth elements (REE) in the flux-cored wire used to produce welds of high-strength low-alloy (HSLA) steel. The effect of REE addition on the microstructure as well as on the mechanical and electrochemical properties of the welded metal (WM) was investigated. REE-modified welded metals show very different responses during electrochemical impedance spectroscopy and the potentiodynamic polarization tests. The results indicate that the addition of REE of 0.3 wt.% facilitates a more uniform microstructure and improves both mechanical properties and corrosion resistance in welded metals.

Corrosion Resistance of Nickel-Based Composite Coatings Reinforced by Spherical Tungsten Carbide

2020 ◽  
Vol 993 ◽  
pp. 1075-1085
Author(s):  
Li Fan ◽  
Hai Yan Chen ◽  
Hai Liang Du ◽  
Yue Hou ◽  
Qian Cheng
Keyword(s):  
Corrosion Resistance ◽  
Tungsten Carbide ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Salt Spray ◽  
Electrochemical Corrosion ◽  
Corrosion Properties ◽  
Oil Drilling ◽  
Passivation Film ◽  
Spherical Tungsten Carbide

Nickel-based composite coatings reinforced by spherical tungsten carbide were deposited on 42CrMo alloy steel using plasma transfer arc welding (PTAW) process. Their electrochemical corrosion properties in NaCl solution under atmospheric and high pressure were studied by polarization curve, electrochemical impedance spectroscopy. The corrosion and erosion resistance of the coatings were also investigated by salt spray corrosion and erosion corrosion tests. The results show that the self-corrosion potential of the composite coatings increased with the increase of tungsten carbide content, and the Cr element in Ni60 sample formed a stable and compact passivation film. Compared with corrosion at atmospheric pressure, the adsorption and penetration of Cl- on the coating surface enhanced due to the increase of Cl- activity under pressure, thereby to weaken the corrosion resistance. The Samples that passivated in salt spray environment, cannot completely hinder the corrosion of the coating, just only to slow down the corrosion. This study can provide theoretical basis for deep-sea oil drilling and production engineering equipment.

Influence of Anodic Oxidation on the Polarization Resistance of Ti6Al4V Alloy after Shot Peening

2014 ◽  
Vol 811 ◽  
pp. 59-62
Author(s):  
Filip Pastorek ◽  
Branislav Hadzima ◽  
Stanislava Fintová ◽  
Mansour Mhaede
Keyword(s):  
Corrosion Resistance ◽  
Surface Treatment ◽  
Anodic Oxidation ◽  
Shot Peening ◽  
Electrochemical Impedance ◽  
Base Material ◽  
Ti6al4v Alloy ◽  
Corrosion Properties ◽  
Almen Intensity ◽  
Anodic Oxidation Process

Ti6Al4V titanium alloy is widely used for industrial and medical applications. Several techniques of surface treatment are used to improve their mechanical, fatigue or corrosion properties like shot peening or anodic oxidation. The effect of these techniques combination on corrosion resistance of the base material was examined in this study. For this purpose, electrochemical impedance spectroscopy tests were performed in 0.1M NaCl solution. Shot peening was carried out using ceramic balls Z850 (Φ 850 μm) at the Almen intensity of 0.13 mmA. Anodic oxidation process was performed on ground and shot peened surface in 7% H2SO4 acid solution at constant used voltage of 65 V. Significant improvement of corrosion resistance by the surface treatment of Ti6Al4V alloy by shot peening with following anodic oxidation was observed however the improvement was lower when compared to surface treated only by anodic oxidation.

scholarly journals Electrochemical Corrosion Characteristics of High Strength Low Alloy Domex 700 Steel After Mechanical Surface Treatment in Chloride Environment

2017 ◽  
Vol 61 (5) ◽  
pp. 162-168 ◽  
Author(s):  
K. Borko ◽  
F. Pastorek ◽  
B. Hadzima
Keyword(s):  
Corrosion Resistance ◽  
Surface Treatment ◽  
Shot Peening ◽  
Steel Surface ◽  
Electrochemical Impedance ◽  
High Strength ◽  
Fatigue Properties ◽  
Electrochemical Tests ◽  
Mechanical Surface Treatment ◽  
Mechanical Surface

Abstract Nowadays a large number of mechanical surface treatments of constructions materials is used in industry, mainly focusing on steel surface treatment. The aim of this study was to evaluate the effects of mechanical surface pre-treatment (grinding and shot peening) on corrosion resistance of high strength low alloy Domex 700 steel. Suitable mechanical surface treatment can by used for surface homogenization (eg. grinding) or for improvement of mechanical, strength and fatigue properties (shot peening). 0,1M NaCl solution of ambient temperature was used as an environment for electrochemical tests. Evaluation of the mechanical surface treatment effect on corrosion resistance of Domex 700 steel surface was realized by electrochemical tests: potentiodynamic polarization tests (using Tafel analysis) and electrochemical impedance spectroscopy (using equivalent circuit). From the obtained results it is possible to conclude, that the process of mechanical surface treatment by shot peening at choosen conditions has negative effect on corrosion resistance of Domex 700 steel.

PYROTOOL A

Alloy Digest ◽  
1971 ◽  
Vol 20 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Good Ductility ◽  
Extrusion Dies ◽  
Temperature Performance

Abstract PYROTOOL A has been designed to display high strength and good ductility at temperatures up to 1200 F. It is used for high-temperature tooling, extrusion dies, liners, dummy blocks, forging dies, mandrels, holders, etc. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Fe-47. Producer or source: Carpenter.

ALCOA 6061 COLD FINISHED BAR

Alloy Digest ◽  
1998 ◽  
Vol 47 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
High Resistance ◽  
High Strength ◽  
Wire Rod ◽  
Good Workability

Abstract Alcoa 6061 alloy has excellent joining characteristics and good acceptance of applied coatings. It combines relatively high strength, good workability, and high resistance to corrosion. The alloy is widely available. The T8 and T9 tempers offer better chipping characteristics than the T6 temper. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion resistance as well as machining and surface treatment. Filing Code: AL-349. Producer or source: ALCOA Wire, Rod & Bar Division.

ALCOA 2024

Alloy Digest ◽  
1998 ◽  
Vol 47 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Surface Finish ◽  
High Strength ◽  
Machined Surface ◽  
2024 Alloy ◽  
Structural Applications ◽  
Strength Material

Abstract Alcoa 2024 alloy has good machinability and machined surface finish capability, and is a high-strength material of adequate workability. It has largely superseded alloy 2017 (see Alloy Digest Al-58, August 1974) for structural applications. The alloy has comparable strength to some mild steels. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion resistance as well as machining and surface treatment. Filing Code: AL-346. Producer or source: ALCOA Wire, Rod & Bar Division.

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