Word of the Day
13 February 2026
rotolining
nounMetalworking
A process that lines the interior of metal objects with a polymer that involves heating and rotating the item.
Why this one
It solves the problem of coating what you cannot reach: no spray gun gets evenly into a tank's corners, elbows or around baffles, so the powder is melted and the part itself is turned until gravity spreads the film.
In use
That surge tank came back rotolined, so tell the fitters no welding on the shell, the whole inside skin goes if it gets hot.
Written by our editors to show how the term is used, not a recorded quotation.