Plating Hard Chrome Plating Alternative Technologies - HVOF Tungsten Carbide Coating

2013 ◽  
Vol 712-715 ◽  
pp. 395-398 ◽  
Author(s):  
Yi Zheng
Keyword(s):  
Tungsten Carbide ◽  
Salt Spray ◽  
Protective Layer ◽  
Neutral Salt ◽  
Carbide Coating ◽  
Chrome Plating ◽  
Technology Preparation ◽  
The Matrix ◽  
Tungsten Carbide Coating ◽  
Hard Chrome

HOVF technology preparation of tungsten carbide coating, can be obtained the microhardness and neutral salt spray corrosion resistance superior to the protective layer of hard chrome plating, its own good toughness and high bonding strength of the matrix, itideal replacement for hard chrome plating technology

scholarly journals Study on Wear Resistance and Corrosion Resistance of HVOF Surface Coating Refabricate for Hydraulic Support Column

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1457
Author(s):  
Mian Wu ◽  
Lin Pan ◽  
Haitao Duan ◽  
Changxin Wan ◽  
Tian Yang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Surface Coating ◽  
Salt Spray ◽  
Corrosive Wear ◽  
Neutral Salt ◽  
Hydraulic Support ◽  
Chrome Plating ◽  
Hard Chrome ◽  
The Impact

The hydraulic support column bears loading and makes reciprocating motion ceaselessly for extended periods, so its service life is far shorter than that of the overall hydraulic support. This paper offers a comparative study on the surface coating of hydraulic support columns with hard chrome plating and high-velocity oxygen fuel (HVOF) thermal spraying refabricating to analyze the impact of different refabricating processes on the microstructure, hardness, corrosion resistance, and wear resistance of the coating (plating). The result shows that the structure of the HVOF coating is uniformly compact, and the HVOF WC10Co4Cr coating has better wear resistance, more than four times that of hard chrome plating. In the neutral salt spray test, the HVOF Ni60 coating shows rustiness at 720 h of the test, which suggests its corrosion resistance is nearly five times that of hard chrome plating. Hence, under the harsh corrosive wear environment, the refabricating HVOF Ni60 is a more suitable replacement for the hydraulic support column coating than the hard chrome plating. Thus, the HVOF Ni60 coating could be an effective replacement for hard chrome plating.

The corrosion protection of AA2024-T3 aluminium alloy by leaching of lithium-containing salts from organic coatings

2015 ◽  
Vol 180 ◽  
pp. 511-526 ◽  
Author(s):  
Peter Visser ◽  
Yanwen Liu ◽  
Xiaorong Zhou ◽  
Teruo Hashimoto ◽  
George E. Thompson ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Salt Spray ◽  
Protective Layer ◽  
Middle Layer ◽  
Organic Coating ◽  
Organic Coatings ◽  
Inhibition Mechanism ◽  
Dense Layer ◽  
Neutral Salt ◽  
Protective Layers

Lithium carbonate and lithium oxalate were incorporated as leachable corrosion inhibitors in model organic coatings for the protection of AA2024-T3. The coated samples were artificially damaged with a scribe. It was found that the lithium-salts are able to leach from the organic coating and form a protective layer in the scribe on AA2024-T3 under neutral salt spray conditions. The present paper shows the first observation and analysis of these corrosion protective layers, generated from lithium-salt loaded organic coatings. The scribed areas were examined by scanning and transmission electron microscopy before and after neutral salt spray exposure (ASTM-B117). The protective layers typically consist of three different layered regions, including a relatively dense layer near the alloy substrate, a porous middle layer and a flake-shaped outer layer, with lithium uniformly distributed throughout all three layers. Scanning electron microscopy and white light interferometry surface roughness measurements demonstrate that the formation of the layer occurs rapidly and, therefore provides an effective inhibition mechanism. Based on the observation of this work, a mechanism is proposed for the formation of these protective layers.

Effect of Helmholtz Oscillation on Auto-shroud for APS Tungsten Carbide Coating

2013 ◽  
Vol 22 (5) ◽  
pp. 756-763
Author(s):  
Younggil Jin ◽  
Sooseok Choi ◽  
Seung Jae Yang ◽  
Chong Rae Park ◽  
Gon-Ho Kim
Keyword(s):  
Tungsten Carbide ◽  
Carbide Coating ◽  
Tungsten Carbide Coating

Plasma Sprayed Tungsten Carbide Coating

1984 ◽  
Author(s):  
Gu Xin yuan ◽  
Wang Shi hua ◽  
Geng Jia Lin
Keyword(s):  
Tungsten Carbide ◽  
Carbide Coating ◽  
Tungsten Carbide Coating ◽  
Plasma Sprayed

Effect of sub-layer temperature during HFCVD process on morphology and corrosion behavior of tungsten carbide coating

2018 ◽  
Vol 16 (1) ◽  
pp. 243-253 ◽  
Author(s):  
Seyyed Hashem Mousavi Anijdan ◽  
Masoud Sabzi ◽  
Mohsen Asadian ◽  
Hamid Reza Jafarian
Keyword(s):  
Tungsten Carbide ◽  
Corrosion Behavior ◽  
Carbide Coating ◽  
Tungsten Carbide Coating

scholarly journals A Novel Accelerated Corrosion Test for Supporting Devices in a Floating Photovoltaic System

2021 ◽  
Vol 11 (8) ◽  
pp. 3308
Author(s):  
Chun-Kuo Liu ◽  
Zhong-Ri Kong ◽  
Ming-Je Kao ◽  
Teng-Chun Wu
Keyword(s):  
Corrosion Test ◽  
Salt Spray ◽  
Protective Layer ◽  
Photovoltaic System ◽  
Galvanized Steel ◽  
Neutral Salt ◽  
Accelerated Corrosion ◽  
Accelerated Corrosion Test ◽  
Type 304

Recently, countries from around the globe have been actively developing a new solar power system, namely, the floating photovoltaic (FPV) system. FPV is advantageous in terms of efficiency and cost effectiveness; however, environmental conditions on the surface of water are harsher than on the ground, and the regulations and standards for the long-term durability of supporting devices are insufficient. As a result, this study aims to investigate the durability of supporting devices through a novel type of accelerated corrosion test, copper-accelerated acetic acid salt spray (CASS). After an eight-day CASS test, the results demonstrated that only a small area of white protective layer on the SUPERDYMA shape steel was fully corroded and rusted. Moreover, five types of screw, fastened solidly on the SUPERDYMA shape steel, namely a galvanized steel screw capped with a type 316 stainless steel (SS) nut, a type 304 SS screw, a type 410 SS screw, a chromate-passivated galvanized steel screw, and a XP zinc–tin alloy coated steel screw, achieved varying degrees of rust. In general, the corrosion degree of the eight-day CASS test was more serious than that of the 136-day neutral salt spray (NSS) test. Therefore, the CASS test is faster and more efficient for the evaluation of the durability of supporting devices.

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