Corrosion protection by acrylamide treatment for magnesium alloy metal matrix composite (MMC) reinforced with titanium boride

Abstract

Using potentiodynamic polarisation, polarisation resistance and electrochemical impedance spectroscopy measurements, the effect of amide treatment to magnesium metal matrix composite in 0?6 N sodium chloride medium has been studied. The corrosion potential E corr , corrosion current I corr , polarisation resistance R p and charge transfer resistance R ct were determined from the corresponding plots. E corr shifted towards more negative values while I corr decreased with increasing treatment time. Surface analysis with SEM and AFM showed an improvement in surface due to formation of a film. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) studies confirmed the film formation and the coordination of magnesium to the oxygen in the amide compound.

Influence of Anodic Oxidation on the Organizational Structure and Corrosion Resistance of Oxide Film on AZ31B Magnesium Alloy

“…Compared to the substrate, the overall E corr of the anodized films shifted in the positive direction, and R p increased with voltage, while I corr decreased, indicating enhanced corrosion resistance of the anodized AZ31B magnesium alloy. An increase in corrosion current density accelerated the corrosion rate of the film, whereas a rise in corrosion potential reduced the tendency for corrosion [56,57].…”

Chemical Vapour Deposition of Graphene for Durable Anticorrosive Coating on Copper

“…A feasible method to reduce the corrosion damage is by coating the metal with a stable and anticorrosive layer. Nevertheless, those traditional protective coatings, including organic layers [ 2 , 3 , 4 ], polymers coating [ 5 , 6 ], oxide layers [ 7 ], and inert metals [ 8 ] have their limitations. For example, the high thickness is necessary for traditional anticorrosive layers to ensure protective effects [ 9 , 10 , 11 , 12 ].…”

Corrosion resistance of organic coating pretreated by phytic acid

“…13 Therefore, the study of chemical conversion films on magnesium alloys has attracted much more attentions. Many kinds of methods have been proposed for chemical conversion processing of magnesium alloys, such as chromate,14 permanganate,15 silicate,16 titanate,17 rare earth salts18 and organic acid 19. Chemical conversion film treatments such as chromates or permanganates all cause severe pollution to the environment for they contain heavy metal ions although these techniques are comparatively mature.…”