scholarly journals Applications and Contributions of Physics to the Surface Treatment Process of Materials Part I: Thermal Spray Processes

2018 ◽  
Vol 3 (4) ◽  
pp. 74
Author(s):  
Omar Alvarez ◽  
A. Barba ◽  
R. Valdez ◽  
R. González ◽  
A. Covelo ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Surface Treatment ◽  
Thermal Spray ◽  
Engineering Students ◽  
Treatment Process ◽  
Surface Treatments ◽  
Basic Sciences ◽  
Practical Applications ◽  
Physics Concepts ◽  
Thermal Spray Processes

The objective of these two works is to show how a series of principles and concepts of Physics are applied (which are taught in the areas of Basic Sciences in Engineering careers), in various processes that are used to modify the surface of materials and thus provide them with improved properties particularly related to wear, fatigue and corrosion resistance, with the purpose that engineering students have greater evidence of practical applications and, therefore, of the importance of Physics for development of these technologies. As an example, in this first article, the Thermal Spray processes are presented and it is shown how Physics concepts are applied and have a prominent role both in the design and in the construction of the equipment with which they are made, as well as in the own generation of surface treatments. This is intended to give a sample and evidence the usefulness of Physics in this type of process to both students and teachers.

scholarly journals The Hybrid Process of Low-Pressure Carburizing and Metallization (Cr + LPC, Al + LPC) of 17CrNiMo7-6 and 10NiCrMo13-5 Steels

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 567
Author(s):  
Paulina Kowalczyk ◽  
Konrad Dybowski ◽  
Bartłomiej Januszewicz ◽  
Radomir Atraszkiewicz ◽  
Marcin Makówka
Keyword(s):  
Corrosion Resistance ◽  
Surface Layer ◽  
Physicochemical Properties ◽  
Surface Treatment ◽  
Retained Austenite ◽  
Treatment Process ◽  
Active Surface ◽  
Low Pressure ◽  
Low Alloy Steel ◽  
Chromium Plating

This paper presents the concept of modification of physicochemical properties of steels by simultaneous diffusion saturation with carbon and chromium or aluminum. The application of a hybrid surface treatment process consisting of a combination of aluminizing and low-pressure carburizing (Al + LPC) resulted in a reduction in the amount of retained austenite in the surface layer of the steel. While the use of chromium plating and low-pressure carburizing (Cr + LPC) induced an improvement in the corrosion resistance of the carburized steels. It is of particular importance in case of vacuum processes after the application of which the active surface corrodes easily, as well as in case of carburizing of low-alloy steel with nickel, where an increased content of retained austenite in the surface layer is found after carburizing.

Research of the Surface Treatment Process of Bonded NdFeB Magnet with Composite Powder Electrostatic Spraying

2018 ◽  
Vol 278 ◽  
pp. 63-71 ◽  
Author(s):  
Kai Ye Xiao ◽  
Hai Xu ◽  
Zhi Wei Guo ◽  
Wen Zheng
Keyword(s):  
Corrosion Resistance ◽  
Surface Treatment ◽  
Surface Coating ◽  
Composite Powder ◽  
Treatment Process ◽  
Ndfeb Magnet ◽  
Treatment Technology ◽  
Electrostatic Spraying ◽  
Strong Adhesion ◽  
Epoxy Paint

Compared with the traditional air spraying technique and electroplate method, the coating defects of bonded NdFeB magnet, such as the workpiece hanging point, the pinhole, the bubble, have been solved by using the composite powder electrostatic spraying as surface treatment technology, along with the EE epoxy paint as primer coating and PU polyurethane paint as surface coating. The coating of this composite powder electrostatic spraying is uniform and compact, and the coating has strong adhesion and corrosion resistance. This paper gives a detailed introduction to the composite powder electrostatic spraying, including the choice of some important parameters and the unique hanging tools of composite powder electrostatic spraying.

Corrosion Resistance of Thermal Spray Inconel 690 Coatings

1998 ◽  
Author(s):  
B. Normand ◽  
H. Liao ◽  
O. Landemarre ◽  
C. Coddet ◽  
J. Pagetti
Keyword(s):  
Corrosion Resistance ◽  
Thermal Spray ◽  
Industrial Applications ◽  
Localized Corrosion ◽  
Spray Coatings ◽  
Inconel 690 ◽  
Coating Microstructure ◽  
Passive Current ◽  
Thermal Spray Processes ◽  
Unmelted Particles

Abstract Inconel thermal spray coatings are potential candidates for wide industrial applications. However, the coating structure resulting from thermal spray processes characterized by unmelted particles, oxides and porosity can severely hinder their corrosion resistance in agressive media. The aim of the present work was to optimize elaboration parameters in order to enhance their chemical stability. Electrochemical criteria were used to identify the ability of those coatings to form a passive film in a sulfuric acid solution and also to determine their local corrosion resistance in a chloride solution. Results show that the passivity state is strongly conditionned by the coating microstructure. Coatings free of unmelted particles exhibit a notably reduced passive current density while the localized corrosion resistance seems conditionned by the amount of interlamellar oxide.

Reliability Evaluation for Aerospace Anodizing Process of Aluminum

2010 ◽  
Vol 638-642 ◽  
pp. 419-424
Author(s):  
Chau Chen Torng ◽  
Chi Kong Huang ◽  
Hsien Ming Chang
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Probability Distribution ◽  
Surface Treatment ◽  
Treatment Process ◽  
Failure Time ◽  
Control Engineer ◽  
Salt Spray ◽  
Critical Test ◽  
Failure Data

Detail parts of airframe should have higher precision and lightweight to satisfy the requirements of safety, payload, and controllability. Due to requirement of lightweight, aluminum alloy is widely used in airframe parts. Anodizing process is an important surface treatment process uses to prevent corrosion in aluminum parts. Salt spray is the critical test to verify the anodizing process of aluminum alloy and ensure the corrosion resistance can meet the requirement of specification. This study collects the failure time of salt spray and uses statistical method to construct the suitable probability distribution of those failure data. Furthermore, analyzes the failure time of salt spray and evaluate the reliability of anodizing process. Thereby the process control engineer can use the concept of reliability to monitor the anodizing process.

ALLEGHENY LUDLUM AL276

Alloy Digest ◽  
1996 ◽  
Vol 45 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Power Plant ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Crevice Corrosion ◽  
Heat Treating ◽  
Chemical Plants ◽  
Temperature Performance

Abstract Allegheny Ludlum AL276 is widely used in the most severe environments found in chemical plants and in power plant desulfurization systems. The high molybdenum level with tungsten gives excellent pitting and crevice corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, joining, and surface treatment. Filing Code: Ni-497. Producer or source: Allegheny Ludlum Corporation.

NILO ALLOY 36

Alloy Digest ◽  
1987 ◽  
Vol 36 (8) ◽  
Keyword(s):  
Thermal Expansion ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Constant Coefficient ◽  
Coefficient Of Thermal Expansion ◽  
Heat Treating ◽  
Temperature Performance ◽  
Iron Nickel

Abstract NILO alloy 36 is a binary iron-nickel alloy having a very low and essentially constant coefficient of thermal expansion at atmospheric temperatures. This datasheet provides information on composition, physical properties, 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-79. Producer or source: Inco Alloys International Inc..

UNITEMP N-155

Alloy Digest ◽  
1971 ◽  
Vol 20 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Wide Temperature Range ◽  
Heat Treating ◽  
Combustion Chambers ◽  
Temperature Performance ◽  
Oxidation And Corrosion

Abstract UNITEMP N-155 is an iron-base austenitic alloy used over a wide temperature range from subzero to about 1800 or 1900 F. It has relatively good oxidation and corrosion resistance. It is used in such applications as turbine rotors, shafts and blades, afterburner parts, nozzles and combustion chambers. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on high temperature performance as well as forming, heat treating, joining, and surface treatment. Filing Code: Fe-48. Producer or source: Cyclops Corporation.

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.

UNISPAN LR35

Alloy Digest ◽  
1971 ◽  
Vol 20 (1) ◽  
Keyword(s):  
Thermal Expansion ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Coefficient Of Thermal Expansion ◽  
Heat Treating ◽  
Temperature Performance ◽  
Operational Level

Abstract UNISPAN LR35 offers the lowest coefficient of thermal expansion of any alloy now available. It is a low residual modification of UNISPAN 36 for fully achieving the demanding operational level of precision equipment. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and surface treatment. Filing Code: Fe-46. Producer or source: Cyclops Corporation.

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.

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