Surface functionalisation by the introduction of self-healing properties into electroless Ni-P coatings

Alicja Stankiewicz, Zoi Kefallinou, Grzegorz Mordarski, Zofia Jagoda, Ben Spencer

Research output: Contribution to journalArticlepeer-review

Abstract

Ni-P∖alginate microgels coatings, as potential metallic protective coatings with self-healing properties, were deposited by the electroless method. The alginate microgels contained nickel chloride and sodium hypophosphite. It was proven that the reduction of nickel ions released from the microgels is possible on the steel and Ni-P coating surface. The self-healing effect of this system was studied by X-ray fluorescence (XRF), chronoamperometry and scanning vibrating electrode technique (SVET). An improved corrosion protection observed here is attributed to the reduction of nickel ions to metallic nickel on the tested surfaces. Differences in the surface concentration of nickel and phosphorous species in the corrosion tested coatings with and without microgels, as evaluated using X-ray Photoelectron Spectroscopy (XPS), provided substantial evidence for the formation of a Ni-P coating from the compounds included in the microgels.
Original languageUndefined
Pages (from-to)427-434
Number of pages8
JournalElectrochimica Acta
DOIs
Publication statusPublished - Feb 2019

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