Corrosion resistance of MoS2-modified titanium alloy micro-arc oxidation coating

Role of rare‐earth Y addition on formation and anticorrosion properties of MAO coating on 2024 aviation aluminum alloy

“…30 In addition, C R denotes the corrosion rate, the magnitude of which is directly related to I corr . 5,31 It can be seen from Table 1 that during the change of yttrium nitrate concentration from 0 to 2.0 g/L, the E corr still increases first and then decreases, whereas the change of I corr shows the opposite trend, which indicates that the addition of Y(NO 3 ) 3 ⋅6H 2 O can improve the barrier property of the coating to a certain extent. When 1.5 g/L yttrium nitrate was added to the electrolyte, the E corr and I corr of the specimen reached the maximum and minimum value, respectively.…”

“…One way to solve this problem is surface treatment involving chemical conversion, sol-gel, metallic coating and micro-arc oxidation (MAO), and so forth. 4,5 Of these methods, MAO is a cost-effective and environmentfriendly surface treatment technology and is widely used in space engineering, ships, petrochemicals, medical engineering, and so forth. The MAO coatings prepared on the surface of valve metal (such as Al, Mg, and Ti) have excellent corrosion resistance, wear resistance, high temperature resistance, electrical insulation, biocompatibility, and so forth.…”

“…Aircraft located at coastal airports flew or parked in high humidity, high salt marine environments, where seawater or the humid marine atmosphere had caused serious corrosion damage to the aluminum alloy components of the aircraft. One way to solve this problem is surface treatment involving chemical conversion, sol–gel, metallic coating and micro‐arc oxidation (MAO), and so forth 4,5 . Of these methods, MAO is a cost‐effective and environment‐friendly surface treatment technology and is widely used in space engineering, ships, petrochemicals, medical engineering, and so forth.…”

“…5 -10 4 Hz) and the other in the medium frequency range (10 2 -10 0 Hz), indicating that F I G U R E 5 X-ray photoelectron spectroscope (XPS) of the coating: (A) wide, (B) P, (C) Y F I G U R E 6 Potentiodynamic polarization curves of Al substrate and micro-arc oxidized samples in simulated seawater (SSW) solution TA B L E 1 Electrochemical parameters of various samples fitted from polarization curves Nyquist plots of micro-arc oxidation (MAO) coatings immersed in simulated seawater (SSW) solution F I G U R E 8 Bode plots for the micro-arc oxidation (MAO) coatings containing different concentrations of Y(NO 3 ) 3 ⋅6H 2 O Equivalent circuit models: (A) 0 g/L, (B) .5 g/L, (C) 1.0 g/L, 1.5 g/L, and 2.0 g/L…”

Influence of Scanning Speed on the Microstructure and Wear Resistance of Laser Alloying Coatings on Ti-6Al-4V Substrate

“…However, low hardness and poor wear resistance severely limit their applications as transmission components [ 10 , 11 ]. In order to improve the properties of titanium alloys, a range of surface modification methods have been employed, which mainly include chemical heat treatment [ 12 , 13 ], ion implantation [ 14 , 15 ], micro-arc oxidation [ 16 , 17 ], electroplating [ 18 ], vapor deposition [ 19 , 20 ] and thermal spraying [ 21 , 22 ].…”