Procedure for test Billets

Billet A

• Sand blast both sides with glass beads and wire brush one side
• Degrease billet for 5 minutes at 190° F
• Rinse and verify water break, if test fails replace degreaser
• Dip in 5% Muriatic solution for 3 seconds
• Rinse thoroughly
• Verify pH of plating solution is between 5.5 and 6 (down to 4.7 is ok, above 6.3 will precipitate zinc)
• Plate billet in agitated 110° F solution for 25 minutes at current of 0.42 amps (0.5″ x 3″ x 2 sides * 0.14 amps/sq. in.)
• Rinse
• Dip in blue chromate for 30 seconds (note temperature of the bath)
• Rinse
• Dip in yellow chromate for 14 seconds at 80° F
• Dry with compressed air

Billet B

• As above but plate dummy billet for 30 minutes first

Billet C

• As above but add new anodes

Billet D

• As above but with new plating solution (without brightener)

Billet E

• As above but with brightener

Billet F

• As above but without blue chromate step