Open AccessPlasma processing of Fe-P/rGO powder for making robust wear resistance and anticorrosion coating over mild steel
Author(s) -
Debidutta Debasish,
Shubhra Bajpai,
Snigdha Gochhayat,
Tapan Dash,
Ankeet Rajan Pati,
Pranay Kumar Patra,
A. N. Bhagat,
Saroj Kumar Singh,
Tapan Kumar Rout
Publication year - 2022
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ac5553
Subject(s) - materials science , oxide , graphene , metallurgy , thermal spraying , scanning electron microscope , corrosion , coating , composite number , ingot , composite material , nanotechnology , alloy
Phosphating is a widely used metal pre-treatment process due to its ability to improvise pitting corrosion resistance, wear-resistance, and adherence properties. In the present investigation, we report the manufacturing of spray grade powder of Fe-P metal ingot by mechanical hammering, milling and sieving process. The Fe-P powder and its blending with reduced graphene oxide (rGO) (2 and 4 vol%) were successfully coated over mild steel by the thermal plasma spray method for the first time . Successful retention of rGO was observed even after thermal plasma spraying of Fe-P/rGO (2 vol% and 4 vol%), which was challenging and yet to be reported. The morphological investigation of the top-coat layer and cross-section was analysed using a field emission scanning electron microscope (FESEM). The presence of G, D and 2D bands at 1580 cm −1 , 1350 cm −1 , and 2700 cm −1, respectively in the Raman spectra were the straightforward demonstration of the retention of rGO. Hardness and air-jet erosion tests were performed to evaluate mechanical properties in view of exploring commercial applications of such coatings. We found that Fe-P-rGO composite coatings exhibited improved hardness, erosion, and corrosion resistance properties with increasing reduced graphene oxide content.