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' alumina ' and pistons '
1) 'Alumina' is a specialized ceramic coating, and is not associated with typical aluminum automotive pistons.
2) If piston 'scuffing' is presenting, then the piston has experienced an 'overheat' situation at which the aluminum has reached metallurgic 'plasticity' and yielded. Re.: Daimler-Benz AG, Stuttgart, Germany ( operator abuse or neglect )
3) The Roach Criteria are related to 'steel' surfaces.
4) Pistons typically ride inside 'cast-iron' engine block bores, cast-iron-'sleeved' aluminum engine blocks... HONDA/ACURA have successfully 'surface-treated' aluminum bores, obviating the need of 'liners.'
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Last edited by aerohead; 01-16-2025 at 12:52 PM..
Reason: add data
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