alireza dordsheikh torkamani

Composite electrodeposition or Electroplating is a process primarily applied in the industry through which metal substrates are coated with an additional phase, such as low-thickness films of a range of metals. Lately, the ad-vent of coating based on metal matrix through deposition has been vital because the superior hardness has more improved wear and corrosion resistance than alloy-based or pure coatings of metal. Nickel is an engineering material, which has been broadly utilized for metal matrix applications. This paper summarizes recent research on the electrodeposition of nickel matrix composite coatings with borides ceramic particles. Some of these particles are ZrB2, BN, TiB2, Ni3B, CrB2, etc. in the nickel matrix. In addition, the most important results achieved in the field of these composite coatings were collected in this review.

Magnesium has little resistance to corrosion and therefore its production and use are quite limited. The problem of corrosion associated with these alloys has been alleviated to some extent by the advantages obtained from fine coatings. An additional dense barrier against corrosion is created, using coatings obtained from sol-gel. As an alternative for Cr-based conversion coatings, rare-earth elements-based ones are been increasingly investigated for Mg and its alloys due to being eco-friendly. Because of chemical inertness, low friction, and high hardness, diamond-like carbon (DLC) coatings have exhibited the best protection for Mg and its alloys. In this review, we shed light on recent advancements in novel coatings for Mg alloys including hybrid, rare-earth conversion, composite polymeric (polymer composite is a multi-phase material in which reinforcing fillers are integrated with a polymer matrix), and DLC coatings.