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.

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.

Improvement of Corrosion Resistance of Aluminum Alloy by a New Surface Treatment Technology ‘PAHP-Treatment’

2005 ◽  
Author(s):  
Haruhiko Murakami ◽  
Makoto Kawai ◽  
Hiroaki Tamamaki ◽  
Takahiro Yuuki ◽  
Keisuke Daikoku ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Surface Treatment ◽  
Treatment Technology

Effects of Coating/Electroplating on Corrosion Resistance of Steel Bar in Reinforced Concrete

2012 ◽  
Vol 446-449 ◽  
pp. 3176-3179 ◽  
Author(s):  
Qun Zhou ◽  
Zhong He Shui ◽  
Yi De Xiao ◽  
Chang Sheng Xu
Keyword(s):  
Corrosion Resistance ◽  
Reinforced Concrete ◽  
Surface Treatment ◽  
Equivalent Circuit ◽  
Surface Coating ◽  
Corrosion Process ◽  
Steel Bar ◽  
Study Results ◽  
Steel Bars ◽  
Corrosion Of Steel

One of the main reasons for the damage of reinforced concrete is the expansion caused by corrosion of steel bar in concrete. In this paper, the equivalent circuit that inflects corrosion process of steel bars in reinforced concrete was analyzed, with the A.C.Impedance Spectrum method. And the effects of surface treatment of the bars on corrosion resistance of the reinforced concrete were investigated. Study results show that the surface coating (plating) on the built-in reinforcement can effectively prevent corrosion of steel bar, thereby enhancing the durability of concrete structures.

Study on Corrosion Resistance of Welding HAZ Treated by Laser Surface Quenching

2012 ◽  
Vol 512-515 ◽  
pp. 2321-2324
Author(s):  
Yan Li Li ◽  
Fang You Hu ◽  
Jia Rui Qi ◽  
Pei Zhong Zhao ◽  
Xiao Mei Zhang
Keyword(s):  
Corrosion Resistance ◽  
Surface Treatment ◽  
Processing Parameters ◽  
Laser Surface ◽  
New Technique ◽  
Laser Surface Treatment ◽  
Treatment Technology ◽  
Laser Quenching ◽  
Corrosion Resistance Property ◽  
Surface Quenching

Generally, the welding HAZ is more sensitive to corrosion. In order to increase the corrosion resistance of the welding HAZ in aircraft structures, the laser surface treatment technology was used to treat the welding HAZ. In this study, the processing parameters of the laser surface treatment were optimized. According to our study, the laser quenching can increase the corrosion resistance property obviously. The laser surface treatment new technique has been used in the maintenance of the airplane structures, which has better application outlook.

Study on Ultrasonic Electroforming Ni-P Coatings on NdFeB Permanent Magnet

2012 ◽  
Vol 535-537 ◽  
pp. 1275-1278
Author(s):  
Li Li ◽  
Xiang Cheng ◽  
Feng Shi Yin
Keyword(s):  
Corrosion Resistance ◽  
Nacl Solution ◽  
Adhesion Test ◽  
Ndfeb Magnet ◽  
Ultrasonic Agitation ◽  
New Process ◽  
Strong Adhesion ◽  
Alloy Deposit ◽  
Ndfeb Permanent Magnet ◽  
Poor Adhesion

In order to improve the corrosion resistance of sintered NdFeB magnet, experiments are done by the new process which involves ultrasonic electroforming Ni–P alloys. The influence of ultrasonic on electroforming Ni–P alloy on NdFeB was studied by using microscope, adhesion test and NaCl solution immersion test.The results showed that the Ni–P alloy deposit on NdFeB is rough and has poor adhesion without ultrasonic agitation; However, the Ni–P alloy deposit on NdFeB with ultrasonic agitation has the following advantages: uniform and smooth deposit grains, strong adhesion and good corrosion resistance.

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.

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.

Sign in / Sign up

Export Citation Format

Share Document