In this study, effects of pre-oxidation on the hot corrosion behaviour Al–Si coatings in a Na2SO4 and 25 w/% NaCl mixture at 900 °C were investigated. The results showed that after 120 h corrosion, large amount β-NiAl residual was found with no obvious sulphides or oxidation pre-oxidised coating. pre-formed oxide film coating prevented external O2– species such as S2– Cl– from molten salts dire...

Magnesium alloy AM60 has high duc and toughness, which is expected to increase in demand for automotive applications. However, it is too active, and coatings have been extensively studied to prevent corrosion. In this work, a Ba-containing composite phosphate film has been prepared on the surface of AM60. The composition and formation mechanism of the film have been investigated using a scannin...

The thermal insulation effect of the coating was closely related to content filler, but too much filler would cause interfacial compatibility problems various substances in coating, micro-defects and affect anti–corrosion performance coating. Therefore, solving interface problem key preparing a with heat anticorrosion functions. In this study, organic–inorganic hybrid polymer used modify surfac...

In order to evaluate the effect of the functional group present in the ligand backbone towards corrosion inhibition performances, three Schiff-base molecules namely, (E)-4-((2-(2,4-dinitrophenyl)hydrazono)methyl)pyridine (L(1)), (E)-4-(2-(pyridin-4-ylmethylene)hydrazinyl)benzonitrile (L(2)) and (E)-4-((2-(2,4-dinitrophenyl)hydrazono)methyl)phenol (L(3)) were synthesized and used as corrosion in...

An alcoholic extract of a sea weed Sargassum muticum has been used to control corrosion mild steel in 0.5 N HCl. Weight loss method and Electrochemical studies have this study. study reveals that 500 ppm the inhibitor offers 99.25 % inhibition efficiency. Polarization functions as an anodic at higher concentration. The AC impedance spectra confirm formation protective film on metal surface. Ads...

The very thin native oxide film on stainless steel, of the order of 2 nm, is known to be readily modified by immersion in aqueous media. In this paper, XPS and ToF-SIMS are employed to investigate the nature of the air-formed film and modification after water emmersion. The film is described in terms of oxide, hydroxide and water content. The preferential dissolution of iron is shown to occur o...

A β-Ta nanocrystalline coating was engineered onto a Ti-6Al-4V substrate using a double cathode glow discharge technique to improve the corrosion resistance and bioactivity of this biomedical alloy. The new coating has a thickness of ~40 μm and exhibits a compact and homogeneous structure composed of equiaxed β-Ta grains with an average grain size of ~22 nm, which is well adhered on the substra...

A corrosion-inhibiting mixture of compounds has been developed for addition to the water used to rinse metal parts that have been cleaned with aqueous solutions in preparation for adhesive bonding of the metals to rubber and rubberlike materials. Prior to the development of this corrosion inhibitor, the parts (made, variously, of D6AC steel and 7075-T73 aluminum) were rinsed by deionized water,...

Organosilanes are candidates to replace chromates as metal surface pretreatments to inhibit corrosion. Current research shows that silane films are strictly water barriers and show no electrochemical corrosion inhibition. To improve the corrosion performance of silane film, therefore, the foremost objective is to improve water resistance. An understanding the interaction of silane with water is...

In order to prevent corrosion, aluminum nanoparticles were coated with a polyurethane polymer. The coverage of the polyurethane polymer was controlled from 0 to 100%, which changed the corrosion rate of the nanoparticles quantitatively. The surface of the polymer coating was investigated by Transmission Electron Microscopy (TEM) and Atomic Force Microscopy (AFM), and the corrosion resistance of...