BAC 5637 establishes the requirements for the electro-deposition of zinc-nickel alloy plating which is considered a replacement for cadmium with certain restrictions such as threaded parts, steels treated above 220 ksi, and gears. (See the appropriate substitution documents)
This does not supersede drawings or specification requirements. This information shall not be used for production, test, or acceptance processes.
Do not plate steels heat treated to strength levels above 220 ksi (1510 MPa). For steels which are heat treated to strength levels above 220 ksi (1510 MPa), contact the applicable Boeing Engineering organization for verification of callout.
This process and bath are covered by U.S. Patent 4,765,871 and corresponding foreign patents and/or applications. Articles made by this process are covered by U.S. Patent 4,765,871, U.S. Patent 4,818,632 and corresponding foreign patents and/or applications. Patent licenses are available. For further information contact: Director of Licensing Boeing Intellectual Property Business, 15460 Laguna Canyon Road, Irvine, CA 92618 USA.