scholarly journals A Comparative Study of Corrosive-Erosive Effects at AISI D3 Steel, 304 Stainless Steel and CrN/AlN Material

2012 ◽  
Vol 6 (1) ◽  
pp. 14-21 ◽  
Author(s):  
J. C. Caicedo ◽  
G. Cabrera ◽  
H. H. Caicedo ◽  
W. Aperador
Keyword(s):  
Stainless Steel ◽  
Physical Vapor Deposition ◽  
Ph Value ◽  
Impact Angle ◽  
304 Stainless Steel ◽  
Test Machine ◽  
Erosion Processes ◽  
Coated Materials ◽  
The Impact ◽  
Aisi D3 Steel

Corrosive-erosive effect on AISI D3 steel, 304 stainless steel and CrN/AlN coating in aqueous NaCl slurries was studied. CrN/AlN multilayer films with a thickness of 3 µm and bilayer period of Λ = 60 nm (50 bilayers) were obtained by using the physical vapor deposition (PVD) technique (magnetron sputtering). The corrosion-erosion experiments were performed in a test machine in which the impingement velocity, impact angle, concentration of solids and pH of the solution were controlled. Polarization curves were simultaneously obtained to correlate the electrochemical effects to the erosive wear mechanisms. The slurry used consists of silica particles suspended in a mixture of acid solution and 3.5% NaCl, with a pH value of 5.6. Electrochemical results showed the best corrosion resistance for 304 stainless steels. Additionally, the surface analysis by SEM micrograph revealed formation of cracks in CrN/AlN multilayers coating and plastic deformation in both steel substrates (AISI D3 steel, 304 stainless steel), especially when the mean impact angle is a critical value of 90°. Measurements of critical and passive current densities showed that the behavior of coated materials differed depending on the substrate that is used. Nonetheless, in a general way, by increasing the impact angle and by changing its incidence from normal to grazing, it led to a resistance to corrosion-erosion processes.

Investigation into Damage of Stainless Steel Mesh/ALPlate Multi-Shock Shield under Hypervelocity AL-Spheres Impact

2012 ◽  
Vol 525-526 ◽  
pp. 397-400
Author(s):  
Gong Shun Guan ◽  
Dong Dong Pu ◽  
Yue Ha
Keyword(s):  
Stainless Steel ◽  
Impact Angle ◽  
Separation Distance ◽  
Hypervelocity Impact ◽  
Aluminum Plate ◽  
Optimized Design ◽  
Stainless Steel Mesh ◽  
Steel Mesh ◽  
Gas Gun ◽  
The Impact

A series of hypervelocity impact tests on stainless steel mesh/aluminum plate multi-shock shield were practiced with a two-stage light gas gun facility. Impact velocity was approximately 4km/s. The diameter of projectiles was 6.4mm. The impact angle was 0°. The fragmentation and dispersal of hypervelocity particle against stainless steel mesh bumper varying with mesh opening size and the wire diameter were investigated. It was found that the mesh wall position, diameter of wire, separation distance arrangement and mesh opening had high influence on the hypervelocity impact characteristic of stainless steel mesh/aluminum plate multi-shock shields. When the stainless steel mesh wall was located in the first wall site of the bumper it did not help comminuting and decelerating projectile. When the stainless steel mesh wall was located in the last wall site of the bumper, it could help dispersing debris clouds, reducing the damage of the rear wall. Optimized design idea of stainless steel mesh/aluminum plate multi-shock shields was suggested.

Study on Erosion Wear Property of Nickel-Chromium Cast Iron

2011 ◽  
Vol 117-119 ◽  
pp. 1084-1087
Author(s):  
Jing Pei Xie ◽  
Ai Qin Wang ◽  
Wen Yan Wang ◽  
Luo Li Li
Keyword(s):  
Cast Iron ◽  
Strong Acid ◽  
Impact Angle ◽  
Wear Loss ◽  
Test Machine ◽  
Wear Property ◽  
Erosion Wear ◽  
Nickel Chromium ◽  
The Impact ◽  
Chromium Cast Iron

Erosion wear experiments on Nickel-Chromium cast iron were tested by MCF-30 erosion test machine. The structure and surface morphology of these samples were analyzed by Scanning Electron Microscopy (SEM), Transmission Electron Microscope (TEM) and XRD. The influences of the impact angle and acidity on erosion wear property were analyzed. The discipline of the erosion wear property was discussed as well. The experimental results indicate that after oil quench at 960°C and temper at 250°C, the alloy carbide (Fe, Cr)3C which works as the wear resistance skeleton distributes uniformly in the matrix ; the shape of erosion wear curve is “M”. and the biggest wear loss is when the impact angle is 60°; the erosion wear property is affected greatly by the strong acid, but is little even can be ignored when pH≥3. The erosion wear mechanism of Nickel-Chromium cast iron is selective wear.

Determination of the best behavior among AISI D3 steel, 304 stainless steel and CrN/AlN coatings under erosive-corrosive effect

Vacuum ◽  
2012 ◽  
Vol 86 (12) ◽  
pp. 1886-1894 ◽  
Author(s):  
J.C. Caicedo ◽  
G. Cabrera ◽  
W. Aperador ◽  
H.H. Caicedo ◽  
A. Mejia
Keyword(s):  
Stainless Steel ◽  
304 Stainless Steel ◽  
Corrosive Effect ◽  
Aisi D3 Steel

Study on Erosion Wear Property of Nickel-Chromium Cast Iron

2013 ◽  
Vol 575-576 ◽  
pp. 535-538
Author(s):  
Jing Pei Xie ◽  
Li Jun Zhang ◽  
Ai Qin Wang ◽  
Xing Hai Shao
Keyword(s):  
Cast Iron ◽  
Wear Behavior ◽  
Strong Acid ◽  
Impact Angle ◽  
Homogeneous Distribution ◽  
Test Machine ◽  
Wear Property ◽  
Erosion Wear ◽  
The Matrix ◽  
The Impact

The influences of the impact angle and the corrosive agent acidity on low-chromium and nickel contained cast iron were studied in the behavior of erosion wear. The wear rule was summarized and the mechanics of the erosion wear behavior were analyzed in this thesis. Erosion wear experiments were carried on MCF-30 erosion test machine, and then the structure and surface morphology of the samples were analyzed by Scanning Electron Microscopy (SEM). The results showed that the alloy carbide (Fe, Cr)3C was generated by a kind of reticulate distribution in the matrix after oil quench at 960°C and temper at 250°C. The continuous and homogeneous distribution, just like the skeleton of the material, enhanced the wear resistance. The shape of erosion wear curve was M at different impact angles. The biggest wear rate occurred at a 60-degree impact angle. The erosion wear property was greatly affected by the strong acid, but it can be ignored when pH3.

Effects of heat treatment on the microstructure and metallurgical properties of the explosively bonded 304 stainless steel—CK45 steel

2016 ◽  
Vol 27 (4) ◽  
pp. 488-506 ◽  
Author(s):  
Mohammadreza Khanzadeh Gharah Shiran ◽  
Seyyed Javad Mohammadi Baygi ◽  
Seyed Rahim Kiahoseyni ◽  
Hamid Bakhtiari ◽  
Mohsen Allah Dadi
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Steel Plates ◽  
Standoff Distance ◽  
304 Stainless Steel ◽  
Grain Sizes ◽  
Heat Treated ◽  
Vortex Nature ◽  
Impact Kinetic Energy ◽  
The Impact

In this research, the effects of heat treatment are studied on the microstructure and mechanical properties of the explosive bonding of 304 stainless steel plates and CK45 carbon steel with a constant explosive load and various standoff distances. The samples are heat treated in a furnace for 2-h and 4-h at 250℃ and 350℃. The results imply that by increasing the standoff distance from 4 to 5 mm, the impact kinetic energy increases and severe plastic deformation occurs in the bonding interface. The metallography results indicate the wave-vortex nature of the interface with the increase of standoff distance. In addition, heat treatment for 2 h at 350℃ leads to an increase in the thicknesses of intermetallic compounds in the interface. Also, the hardness decreases from 271 to 171 Vickers, and from 279 to 195 Vickers with 2 h of heat treatment at 350℃ in samples with standoff distances of 4 and 5 mm, respectively. Furthermore, the strengths of the samples decrease from 449 to 371 MPa, and from 510 to 433 MPa, respectively. Hardness and strength changes occur due to changes in the thickness of the intermetallic area and an increase in grain sizes.

Investigations of the effect of (Cr1−x, Alx)N coatings’ micro Structure on Impact Toughness

2004 ◽  
Vol 843 ◽  
Author(s):  
K. Bobzin ◽  
E. Lugscheider ◽  
O. Knotek ◽  
M. Maes
Keyword(s):  
Wear Resistance ◽  
Impact Toughness ◽  
Physical Vapor Deposition ◽  
Test Methods ◽  
Coated Materials ◽  
Novel Approach ◽  
Deposition Parameters ◽  
Impact Tester ◽  
The Impact ◽  
Load Behavior

ABSTRACTOriginated from the tooling industry, PVD (Physical Vapor Deposition) coating development focused on increasing the wear resistance. Nowadays, a steadily increasing market is evolving by coating machine parts. The requirements that have to be met due to the needs of this new market segment focus on tribological behavior. This means, that the focus of wear resistance is shifted towards properties like coefficient of friction, wetting behavior and the response of coatings towards dynamic loads. For many tribological applications, coatings are exposed to severe alternating loads, which are usually left out in common test methods. The approach of common coating test methods are based on the static behavior of deposited coatings. The impact tester is a testing device with a novel approach to dynamic load behavior of both bulk and coated materials. In this paper, the effect of the coatings' microstructure and Young's modulus on the impact toughness was investigated. A change in microstructure was provoked by changing deposition parameters like aluminum content. In a second stage these coatings were then tested with respect to their response to high alternating loads. For this purpose both load and number of impacts were varied.

Study on Hardness and Elastic Modulus of Surface Nanostructured 304 Stainless Steel Using Two Mechanical Methods

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
Gang Ma ◽  
Xiang Ling
Keyword(s):  
Stainless Steel ◽  
Surface Layer ◽  
Elastic Modulus ◽  
Bulk Material ◽  
Hardened Layer ◽  
304 Stainless Steel ◽  
Nanostructured Surface ◽  
Surface Layers ◽  
Mechanical Methods ◽  
The Impact

Ultrasonic impact treatment (UIT) can be used to create a thin nanostructured surface layer that plays a significant role in enhancing the overall strength, fatigue life, and corrosion resistance of the treated material. The hardness and elastic modulus of surface nanostructured 304 stainless steel treated by UIT have been investigated by nanoindentation and microhardness measurements. The hardness of the top nanostructured surface layer and its elastic modulus are about 38% and 30% higher, respectively, than those of the bulk material in the nanohardness testing. Also, the hardness is increased by about 23% in the Vickers microhardness testing. The nanohardness of the nanostructured surface layers decreases with depth and then trends to stable values. A hardened layer is found in the impact zone and the thickness is approximately 450–500 μm. All results demonstrated that the surface nanocrystallization can effectively enhance the mechanical properties of the 304 stainless steel.

Research on the Affective Factors on Passive Film of Atmospheric Tower 304 Stainless Steel

2012 ◽  
Vol 161 ◽  
pp. 190-193
Author(s):  
Bing Chen ◽  
Changjiang Wu ◽  
Yu Guang Fan ◽  
Bin Feng
Keyword(s):  
Stainless Steel ◽  
Passive Film ◽  
Pitting Corrosion ◽  
Electrochemical Method ◽  
304 Stainless Steel ◽  
Affective Factors ◽  
The Impact ◽  
Steel Properties

On condition that the surface of 304 stainless steel has formed passive film, we have done research on the impact that the change of concentration of Cl- and Na+, the temperature, pH of Na+, on 304 stainless steel properties. This experiment is preceded studied with electrochemical method. The results show that along with the increase of temperature, pH improves the repairing capacity of passive film on the surface of 304 stainless steel. However, its stability decreases. Meantime, the pitting corrosion will happen become easier, when the repairing capacity of passive film and stability have been weakened because of the concentration of Na+, Cl- increases.

scholarly journals Inhibition Effect of 4-(2-Chlorophenyl)Hydrazineylidene-1-Phenyl-2-Pyrazolin-5-One Derivatives on Corrosion of 304 Stainless Steel in HCl Solution

2021 ◽  
Vol 11 (6) ◽  
pp. 14673-14687
Keyword(s):  
Stainless Steel ◽  
Electrochemical Impedance ◽  
Protective Layer ◽  
Outcome Data ◽  
304 Stainless Steel ◽  
Electrochemical Tests ◽  
Force Microscopy ◽  
The Impact ◽  
Ss 304 ◽  
Hcl Solution

4-(2-chlorophenyl)hydrazineylidene-1-phenyl-2-pyrazolin-5-one derivatives (2-CPH) were examined as safe corrosion hindrance for 304 stainless steel (SS 304) in 1.0 M HCl utilizing weight loss (WL) and electrochemical tests such as potentiodynamic polarization (PP), electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM). The outcome data displayed that the protection efficiency (IE%) rises with improving the dose of 2-CPH compounds and lower with raising the temperature. The adsorption of these inhibitors on the surface of SS 304 follows Langmuir isotherm. The 2-CPH are the best inhibitors for the dissolution of SS 304 in 1M HCl and they are mixed kind inhibitors. Quantum calculations (QM) display the impact of the chemical structure of the 2-CPH on its %IE. Additionally, 304 stainless surface topography in one molar HCl solution without and with 2-CPH compounds appending utilizing atomic force microscopy (AFM) approves the protection of 304 stainless via adsorbed 2-CPH compounds by a formed protective layer.

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