Crafting Metal Surface Morphology to Prevent Formation of the Carbon–Steel Interfacial Composite

We created a coke-repellent inner surface in stainless steel (SS-321) tube using an enhanced chemical etching tactic. A water-borne solution was formulated by combining ion sequestering ligand (L), hydrogen peroxide (H), hydrochloric acid (C), and stabilizing agent (E or N). Three etchants, LHC, LHC-E, LHC-N, were therefore formulated, respectively. The metal surfaces achieved these etchants all show characteristic topographic pattern on micron scale, specifically with grooved spherulite ridge-like patterns. Fundamentally, two patterns prompt overhead micro turbulence fields whose agitation mitigates the entrapment of aromatic hydrocarbon flocs generated from lubricant. is crucial step to trigger coke growth. repellency assessed placing SS-321 filled lubricant heat soak. It found that its roughness level have opposite effects development. Hence, three give rise different coke-resilient surfaces. Moreover, plug flow rate etchant also affects anti-coking performance, exhibiting optimal offers highest coke-proof efficacy.