Preparation and characterization of Ni–P–nanoTiN electroless composite coatings

Preparation of Ni–P–GO composite coatings and its mechanical properties

“…The composite coatings (780 HV) had higher hardness than the Ni-P coatings (416 HV). Evidently, the increase in the microhardness of the composite coatings was due to the effect of plastic deformation generated by the GO particles [4]. The distribution of the compounds in the coating resulted in the dispersion strengthening effects on the coating, which promoted the hardening phenomenon in the coating.…”

“…The addition of various soft/hard particles to the Ni-P coating to obtain coatings with better performance has become an effective method [2]. These extensively used nanoparticles included diamond nanoparticles, silicon carbide (SiC), nano titanium nitride (TiN), and titania (TiO 2 ) [3][4][5]. The excellent properties of these particles can significantly enhance the quality of the coating.…”

Protective diffusion coatings on magnesium alloys: A review of recent developments

“…Different coating processes are described in the literature for protection of Mg alloys, such as electro/electroless plating [7][8][9], anodizing [10][11][12], chemical conversion coatings [13,14], gas-phase deposition [15,16], laser surface alloying/cladding [17] and organic coatings [18,19]. These methods were reviewed in detail by Gray and Luan [20].…”

Electrodeposition of copper coating on AZ31 magnesium alloy

“…Corrosion resistance of magnesium and its alloys is often enhanced by means of surface coatings or treatments such as physical surface modification, chemical conversion coating, electrochemical anodising, chemical plating, electroplating and organic coatings. [1][2][3][4][5] Among above mentioned various surface techniques, electroplating is considered as an effective method to prevent corrosion of magnesium and its alloys. Although nickel coating is widely used to prevent corrosion of metals due to its good corrosion resistance, nickel is very difficultly electrodeposited on magnesium and its alloys because sulphate or chloride in electrolyte of electroplating nickel attacks or corrodes magnesium and its alloy.…”

“…7 In this bath, zinc ions were coordinated by citrate agent to form complexing compound for avoiding replacement between zinc and magnesium; meanwhile, fluorine ion could passivate AZ31 magnesium alloy to avoid magnesium corrosion. 3,7 Yin et al studied that zinc was electrodeposited on magnesium alloys using an aqueous solution containing zincate and alkali. 8 Although alkaline bath did not erode magnesium alloys, the pre-electrodepositing copper on magnesium alloys was often carried out in cyanide bath before electrodepositing zinc.…”