The effect of sodium citrate as a complex agent on the corrosion properties of the electroless Ni-P coating

Corrosion protection of reinforcement steel rebars by the application of electroless nickel coatings

“…The structure of the coatings is dependent on P content [15]. High P coatings were observed to be amorphous [17] and a similar behavior is also expected in the present work.…”

“…This may be done by adopting some means of surface engineering. In this regard, electroless nickel (EN) coatings may prove to be beneficial in providing a cost effective solution for corrosion protection of rebars due to their proven corrosion resistance [15]. EN coatings are widely used in chemical, food processing, petrochemical and automobile industries due to their excellent corrosion resistance [16].…”

“…Further, they are considered to be environment friendly in comparison with chromium coatings [17]. Sodium hypophosphite reduced Ni-P alloy coatings have high corrosion resistance [15,18]. Inclusion of W and Cu in Ni-P to form ternary Ni-P-W and Ni-P-Cu coatings respectively have led to superior corrosion resistance in comparison with the binary variant [16,[19][20][21][22][23][24][25].…”

“…But the use of nano-composite variants for corrosion protection of rebars may not prove to be economically viable in comparison with the binary or ternary alloys. Due to the high flexibility, EN coatings have evolved rapidly to grow into a large family of functional coatings catering into various industrial demands [15][16][17][18][19][20][21][22][23][24][25]. Depending upon the need, a suitable variant from the EN family is selected.…”

Effect of duty cycle on properties of Ni-P-(sol) Al2O3 nanocomposite coatings prepared by pulse-assisted sol-gel method

“…With the development of electroplating technology and nanotechnology, the research on nanocomposite coatings has become the focus of domestic and foreign scholars. The introduction of second-phase particles enhances the performance of these coatings, such as nano-scale SiO 2 [21], SnO 2 [22], Al 2 O 3 [23][24][25][26], TiO 2 [27], SiC [28], PTFE [29], ZrO 2 [30], graphene [31,32], etc. The phase distribution in the nanostructured coating is more uniform than that in micron structure coating since the atoms in the matrix are more firmly bound to the nano reinforcement; the nano-enhancing phase has a more significant enhancement effect than the micron size in the metal system.…”