Characterization of plasma-sprayed carbon nanotube (CNT)-reinforced alumina coatings on ASME-SA213-T11 boiler tube steel

Hot corrosion behaviour of different Cr3C2–NiCr coatings on boiler tube steel at elevated temperature

“…The high corrosion is shown in macrograph of the uncoated substrate and weight change continuously with the very first cycle and went increasing after every cycle. Kamal et al (2017) had suggested that Na 2 SO 4 on reacts with V 2 O 5 form NaVO 3 , (Goyal et al, 2018a(Goyal et al, , 2018b(Goyal et al, , 2018c(Goyal et al, , 2019cRani et al, 2017;Zhou et al, 2017). In case of 20 per cent Cr 3 C 2 -80 per cent (NiCr) coating, the macrograph shows better surface of the substrate.…”

“…One of the protecting ways to counteract the problem of high-temperature degradation is to coat the bottom part with the protective layer using different surface coating techniques (Goyal et al, 2016). The necessary mechanical strength was provided by the composite system of a base material with a protective surface layer different in structure and chemical composition is supplied by a surface treatment can be the best choice in combining material properties (Goyal et al, 2019c(Goyal et al, , 2018b(Goyal et al, , 2018cMehta et al, 2017;Onuoha et al, 2017). Corrosion is controlled by using inhibitors, the addition of an organic inhibitor is sufficient to reduce corrosion of metals in many corrosive media.…”

Mechanical and microstructural properties of carbon nanotubes reinforced chromium oxide coated boiler steel

“…Other compositions were prepared in similar manner. The mixed powders were rolled for 4 h ceaselessly at a speed of 200 rpm (Goyal et al, 2017). The chemical composition of different powders along with particle size is shown in Table II.…”

Role of the Hybrid Addition of Carbon Nanotubes and Graphene Nanoplatelets on the Corrosion Behavior of Plasma‐Sprayed Aluminum Oxide Nanocomposite Coating

“…All the aforementioned studies mainly focus on the improvement of mechanical and tribological properties only, but no inquiries have been made so far on the effect of carbon nanofillers reinforcements on the corrosion behavior of the plasma‐sprayed alumina coatings. However, alumina coating is one of the most resistant material toward corrosion because of itd immunity to degradation in most of the aggressive environments such as harsh chemicals or salt baths, mainly NaCl solutions . But these plasma‐sprayed coatings accompany many defects such as pores, voids, microcracks, and unmelted particles which can undermine the integrity of the coatings and may act as active sites for the dissolution of Cl − ions during immersion into NaCl electrolyte .…”

“…However, alumina coating is one of the most resistant material toward corrosion because of itd immunity to degradation in most of the aggressive environments such as harsh chemicals or salt baths, mainly NaCl solutions. [16,18] But these plasma-sprayed coatings accompany many defects such as pores, voids, microcracks, and unmelted particles which can undermine the integrity of the coatings and may act as active sites for the dissolution of Cl À ions during immersion into NaCl electrolyte. [19] To minimize these defects, carbon nanofillers may be used as effective inclusions into the matrix as discussed in certain literatures.…”