scholarly journals Microstructural and Corrosion Behavior of High Velocity Arc Sprayed FeCrAl/Al Composite Coating on Q235 Steel Substrate

Coatings ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 542 ◽  
Author(s):  
Ndumia Joseph Ndiithi ◽  
Min Kang ◽  
Jiping Zhu ◽  
Jinran Lin ◽  
Samuel Mbugua Nyambura ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Composite Coating ◽  
High Velocity ◽  
Steel Substrate ◽  
Arc Spraying ◽  
Spray Parameters ◽  
Q235 Steel ◽  
Electrochemical Tests ◽  
Al Composite ◽  
Al Coating

High velocity arc spraying was used to prepare FeCrAl/Al composite coating on Q235 steel substrate by simultaneously spraying FeCrAl wire as the anode and Al wire as the cathode. The composite coating was sprayed with varying voltage and current to obtain optimum coating characteristics. FeCrAl coating was also prepared for comparison purposes. The surface microstructure of the coatings was characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The average microhardness of the coatings and the substrate was analyzed and compared. Corrosion resistance was investigated by means of electrochemical tests. The image results showed that a lamellar structure consisted of interwoven layers of FeCrAl and Al. Al and FeCr constituted the main phases with traces of oxides and AlFe intermetallic compounds. The average porosity was reduced and microhardness of the coatings was improved with increasing voltage and current. The FeCrAl/Al coating formed alternating layers of hard and ductile phases; the corrosion resistance of the coatings in the sodium chloride (NaCl) solution depended on the increase in Al content and spray parameters. The corrosion resistance tests indicated that FeCrAl/Al coating had a better corrosion resistance than the FeCrAl coating. FeCrAl/Al can be used to coat steel substrates and increase their corrosion resistance.

Comparative Study of 321 Stainless Steel and 321-Al Composite Coatings Deposited by Arc Spraying Process

2008 ◽  
Vol 373-374 ◽  
pp. 19-22 ◽  
Author(s):  
Yong Xiong Chen ◽  
Bin Shi Xu ◽  
Xiu Bing Liang ◽  
Yi Xu
Keyword(s):  
Stainless Steel ◽  
Composite Coating ◽  
Wear Behavior ◽  
Composite Coatings ◽  
Steel Wire ◽  
Arc Spraying ◽  
Block Type ◽  
Al Composite ◽  
Al Coating ◽  
Spraying Process

A new type of composite coating (321—Al coating) was prepared by using the 321 austenitic stainless steel wire feed stock as the anode and aluminum wire as the cathode in arc spraying process. In order to compare with the new composite coating, the traditional 321 coating with twin 321 stainless steel wires was fabricated. The microstructure and wear resistance of the coatings were characterized by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersion spectroscope (EDS) and MM-200 ring-block type sliding wear tester. Results showed that, except for the aluminum phase addition in the 321—Al coating, no other extra phases produce in comparing with the 321 coating. However, due to the additional aluminum, the 321—Al coating performs quite different microstructure characteristics and tribological behavior. The oxygen content and microhardness of the 321—Al coating are lower than that of the 321 coating, but wear losses are pretty much under the oil lubricated sliding condition. The effect of the microstructure on the wear behavior of the 321—Al coating was also discussed, which is mainly relevant to the characteristic of “ductile aluminum and hard stainless steel composite phases inter-depositing”.

Study on Properties of Zn-Al-Mg-RE Coatings by Arc Spraying

2013 ◽  
Vol 804 ◽  
pp. 79-84
Author(s):  
Fei Lu ◽  
Zhao Qian Xie ◽  
Yu Feng Lu ◽  
Miao Lou ◽  
Meng Zhou ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Arc Spraying ◽  
Long Term Effects ◽  
Electrochemical Protection ◽  
X Ray ◽  
Electrochemical Tests ◽  
Excellent Corrosion Resistance ◽  
Corrosion Reaction ◽  
High Velocity Arc Spraying

In order to improve the organization, reduce the porosity, compact the structure and enhance the corrosion resistance of the coating, Zn-Al-Mg-RE coating system was prepared by high velocity arc spraying. The surface appears, phase composition and electrochemical properties of the coating were characterized by scanning electron microscope, X-ray radiation diffaction and electrochemical workstation. The results indicated that the coatings were compact. The coatings were mainly zinc and aluminum phase. In corrosion of immersion, the reaction resistance and coating resistance of coatings quickly become bigger, the surface of coatings become more compact, and the corrosion reaction is more difficult. Electrochemical tests showed that the coating had excellent corrosion resistance. The electrochemical protection and self-sealing effect of coatings can have long-term effects on anticorrosion.

Microstructure and Wear Resistance of TiC+Cr7C3 Reinforced Ceramal Composite Coating Produced by PTA Weld-Surfacing Process

2010 ◽  
Vol 97-101 ◽  
pp. 1377-1380 ◽  
Author(s):  
Jun Hai Liu ◽  
Ji Hua Huang ◽  
Jun Bo Liu ◽  
Gui Xiang Song
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Steel Substrate ◽  
Wear Test ◽  
Primary Phase ◽  
Dry Sliding Wear ◽  
X Ray ◽  
Q235 Steel ◽  
High Microhardness ◽  
New Type

A new type in situ reinforcing phase TiC+Cr7C3 ceramal composite coating was fabricated on substrate of Q235 steel by plasma transferred arc (PTA) weld-surfacing process using the mixture of ferrotitanium, ferrochromium, ferroboron and ferrosilicium powders. Microstructure and wear performance of the coating were investigated by means of X-ray diffraction (XRD), scanning electron micrograph (SEM), energy dispersive X-ray analysis (EDS), microhardness tester and wear tester. Results show that the composite coating consists of TiC, primary phase Cr7C3 , (Cr,Fe)7C3 and austenite. The composite coating is metallurgically bonded to the Q235 steel substrate. TiC particles present cubic and “dendrite flower-like” shape in the composite coating. The coating has high microhardness and excellent wear resistance under dry-sliding wear test conditions.

Enhanced High Temperature Corrosion Resistance of Al 2 O 3 /Al Composite Coating on γ -TiAl Alloy

2018 ◽  
Vol 47 (4) ◽  
pp. 1075-1081 ◽  
Author(s):  
Xu Yi ◽  
Liang Wenping ◽  
Miao Qiang ◽  
Wang Ling ◽  
Ren Beilei ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Composite Coating ◽  
Tial Alloy ◽  
High Temperature Corrosion ◽  
Al Composite

Corrosion behavior and antifouling ability of Cu-Zn-Al/Zn-Al composite coating on Q235 steel

2021 ◽  
Vol 405 ◽  
pp. 126614
Author(s):  
Yan Qi ◽  
Wenping Liang ◽  
Qiang Miao ◽  
Hao Lin ◽  
Hao An ◽  
...  
Keyword(s):  
Composite Coating ◽  
Corrosion Behavior ◽  
Q235 Steel ◽  
Al Composite ◽  
Antifouling Ability

Microstructure and Properties of TiC/Ni Composite Coating Prepared with Laser Clad on Q235 Steel Substrate

Applied laser ◽  
2014 ◽  
Vol 34 (3) ◽  
pp. 199-203
Author(s):  
李养良 Li Yangliang ◽  
潘东 Pan Dong ◽  
宋杰光 Song Jieguang ◽  
仪登亮 Yi Dengliang
Keyword(s):  
Composite Coating ◽  
Steel Substrate ◽  
Q235 Steel ◽  
Microstructure And Properties

Fe-Cr-C-TiC High-Chromium Fe-Based Ceramic Composite Coating Prepared by PTA Weld-Surfacing Process

2011 ◽  
Vol 675-677 ◽  
pp. 783-787 ◽  
Author(s):  
Li Mei Wang ◽  
Jun Bo Liu ◽  
Chi Yuan
Keyword(s):  
Composite Coating ◽  
Ceramic Composite ◽  
Steel Substrate ◽  
Wear Properties ◽  
High Chromium ◽  
Q235 Steel ◽  
Plasma Transferred Arc ◽  
Transferred Arc ◽  
Microhardness Tester

In situ synthesized Fe-Cr-C-TiC high-chromium Fe-based ceramic composite coating was fabricated on substrate of Q235 steel by plasma transferred arc (PTA) weld-surfacing process using the mixture of ferrotitanium, ferrochromium, ferroboron and ferrosilicium powders. The microstructure and wear properties of the composite coating were investigated by XRD, SEM, EDS, microhardness tester and wear tester. Results show that the coating consists of TiC, (Cr,Fe)7C3 and austenite. The coating is metallurgically bonded to the Q235 steel substrate. TiC particles formed by PTA weld-surfacing process present cubic, dendrite and flower-like shape. The wear resistance of the composite coating is approximately 11 times higher than that of the base body Q235. As the load increases, the wear mass loses slowly, which demonstrates the composite coating has excellent load character.

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