6082-T6 aluminum alloy Al(OH)3 BaSO4 Cymbopogon citratus HAM HAM and numerical method Hard Anodizing (HA) History of engineering & technology Jeffrey, Maxwell, Oldroyed-B fluids MHD Plasma Electrolytic Oxidation (PEO) Plasma Spray Ceramic (PSC) Sisko fluid activation energy anodic polarization anti-coking coating coatings industry coke convection drying corrosion resistance development process digitalization electrode entropy generation filler growth characteristics homotropy analysis method (HAM) hydrocarbon fuel layer-by-layer lemongrass