2024年1月11日 · Normally, about a two-minute zincate immersion is required for commercially pure aluminum, silicon, and copper-containing alloys. Other alloys, such as those containing magnesium, require shorter zincing times.

2019年6月18日 · The object of this work was, therefore, to formulate a zincate solution containing nickel which would be capable of producing a modified immersion deposit on aluminum, to determine the physical and chemical characteristics of this deposit, to assess the adhesion of nickel and some other commonly electroplated metals onto this immersion film ...

Double zincating is a preferred method for plating aluminum and is especially useful on certain difficult-to-plate aluminum alloys to ensure better adhesion of the final metal layer...

2009年9月17日 · First-generation zincates consisted of zinc oxide and sodium hydroxide (caustic soda) in a balanced con-centrate. These commercial blends were introduced in powder form, dissolved to achieve a high operating concentration.

2024年11月30日 · Zincate pretreatment improves the bonding force of the electroless plated Ni-P layer on aluminum alloy in comparison to untreated surface. This phenomenon may be attributed to the lower standard electrode potential of aluminum, which is only −1.66 V.

2018年5月24日 · A new zincate process, Alumseal® 611, has been developed by Atotech to provide very thin zinc coatings in order to reduce the amount of Zn contamination in the EN bath, thus eliminating the need for an EN strike bath.

2013年1月1日 · For more than 80 years now the most generally accepted process for the preparation of aluminum and it alloys for plating has involved the use of a “zincate” or “stannate” processing solution. Environmental issues relative to the use of these processes are becoming more and more of a problem.

2022年1月23日 · The first etching in zincate is to build up etch structure in the aluminium area only for pure aluminium not cast aluminium. You remove this zincate layer in hydrofluoric acid or nitric acid and etch in the zincate for a second time about 20 sec; this zincate has a hexagonal compounding with the aluminium substrate.

The well-known zincate process is the most widely used technique for preparing aluminum for plating. The simplest form of this solution consists only of zinc oxide dissolved in sodium hydroxide. The sodium hydroxide dissolves the surface layer of oxide off the aluminum and zinc is then deposited onto this fresh surface by galvanic action.