Study of the effect of functionalization with inhibitors on the corrosion properties of PEO-coated additive manufactured AlSi10Mg alloy

Plasma electrolytic oxidation (PEO) was carried out on SLM-produced AlSi10Mg alloy using various corrosion inhibitor additives. The study investigated the effects of these additives on microstructural evolution, phase composition, and corrosion behavior by comparing the functionalized coating to a standard base silicate PEO one. The results revealed that, in most cases, the additives significantly altered the coatings' thickness, density, and adherence, leading to improved corrosion resistance due to an enhanced barrier effect over electrolyte penetration. Long-term immersion electrochemical impedance spectroscopy (EIS) tests proved the additives' corrosion inhibitor capability, as they all were able to enhance coating stability.

Automated summary

Plasma electrolytic oxidation (PEO) with various corrosion inhibitor additives was conducted on SLM-produced AlSi10Mg alloy, and the effects of these additives on coating properties were investigated. The results showed that the additives could significantly modify the coatings and enhance their corrosion resistance.