Alkaline liquid which is supplied as a ready-to-use solution for depositing an adherent fine grained, zinc surface on aluminum and aluminum alloys prior to electroplating

OPTIBOND CONCENTRATE is an alkaline liquid which is supplied as a ready-to-use solution for depositing an adherent fine grained, zinc surface on aluminum and aluminum alloys prior to electroplating.  It works equally well on wrought and cast aluminum surfaces.  It is especially well suited for alloys of aluminum that contain high concentrations of alloying ingredients.  It has been used successfully on alloys with up to 5% wt. copper, 1% wt. manganese, 13% wt. silicon, 9% wt. magnesium, or 6% wt. tin.  OPTIBOND Concentrate is not formulated for use on pure magnesium, or magnesium castings.  The tightly adherent, fine grained deposit from this system in some cases allows for a single zincate.

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