Abstract
Tin matrix nanocomposite coatings containing ZnO and NiO nanoparticles, both individually and combined, were deposited on low carbon steel substrates. The aim was to investigate the effect of reinforcement of nanoparticles on microstructural morphology and thickness of tin coatings, modification in the interfacial layer between coating and substrate, and the corrosion resistance of low carbon steel substrate. Optical and scanning electron microscopy were employed for microstructural observation, while potentiostat-galvanostat was utilized for electrochemical investigation. It was found that the tin nanocomposite coatings with nanoparticles significantly modified the coating thickness, intermetallic layer thickness, and surface corrosion resistance. Coatings through the direct tinning process are considered to be a simple and low-cost route for protecting metallic materials from corrosion, and the presence of ZnO and NiO nanoparticles in tin coatings further increases the corrosion resistance of low carbon steels.
Highlights
The improvement of surface properties of steel alloys has always been a crucial criterion for their use in advanced engineering applications such as petrochemical processes, automotive industries, and energy transformation
It was concluded that a coating layer with 0.50 wt.% alumina nanoparticles is highly recommended for achieving better corrosion resistance for coated mild steel with minimal coating layer defects
The SEM-TEM images and XRD patterns of the as-prepared particles are shown in Fmiguultri-easre2TaasnhodfeZ3,nSrOeEsapnMedctNi-viTeOlyE.spTMehceimSieEmnMs a(iomgbateagienssedaanfndrodtmheSXEpaMRrtiiDmcleasgpesiszaaentidtnevimersnatiggseaationoanflsyztfoehrr e asmshFeaaipsgeusruewmriteehnstasv)2esrhaogawenepddarthtiac3tle,tshersieazses-poprfeaepbacortueditv9Z5en±Olyp10a.rntTimclh.esHewoewSreeEvineMrb, oththeirmaosd-paarnegpdeasrpsehdeaNrinciOadl the spmeciumletnis-haowreedassphoerficaZl snhaOpesawnithdavNeraigOe pasrtpicleescsiimze oef nabsou(t o60b±ta7 ninm.ed from S measurements) showed that the as-prepared ZnO particle shapes with average particles size of about 95 ± 10 nm. specimen showed spherical shapes with average particle
Summary
The improvement of surface properties of steel alloys has always been a crucial criterion for their use in advanced engineering applications such as petrochemical processes, automotive industries, and energy transformation. Surface modifications of metallic alloys were investigated via different techniques including gaseous, solutions and molten or semi-molten states using hot-dipping, thermal diffusion, thermal spraying, packing, and oxidation processes [2–7] In these techniques, the selection of the composition of the coated materials is one of the main factors which determine the success of the coating process. In a specific study [28], the effect of the addition of alumina nanoparticles to tin coating layer during tinning process on the interfacial microstructure and corrosion behavior of mild steel was investigated. The present work develops a promising solution for the modification of surface properties of low carbon steels through direct tinning processes using tin nanocomposite reinforced with nano-sized particles of NiO and/or ZnO. Very fine nano powder with few nanometers was obtained after milling
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