zincinghttp://www.oed.com/dictionary/zincing_adj%3Ftab%3Dmeaning_and_usezincing, adj. & n.
First published 1921; not fully revised

zincingadjective & noun

  1. 1841–
    1. 1841
      Improvements..in tinning or zincing metal.
      Civil Engineer & Architect's Journal vol. 4 328/2
    2. 1843
      An estimate for zinking the suspension bridge at Hungerford Market.
      Pract. Mechanic & Engineer's Magazine vol. 2 342
    3. 1891
      Parkes's process, or, as it is now frequently called, ‘zincing’.
      J. A. Phillips, Elements of Metallurgy (ed. 3) 700

Originally published as part of the entry for zinc, v.

zinc, v. was first published in 1921; not fully revised.