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Bonderite® M-ZN 606
The Bonderite M-ZN 606 (was Granodine 606) process simultaneously degreases and phosphates steel, aluminium, and zinc surfaces. Applied by a three- or four-stage conveyor process or in a multi-stage cabinet wash, it leaves surfaces with a lightweight blue phosphate coating which provides corrosion protection and is an excellent base for paint. Immersion processing can also be undertaken. Bonderite M-ZN 606 can be used to treat galvanised sheet, zinc die-castings (Mazak), electro-zinc (Zintec), steel, and aluminium, together or separately. The degreasing action cleans the metal surface clean of oils and grease, enabling the phosphating action to convert the metal. The specially-formulated detergents included in Bonderite M-ZN 606 give powerful degreasing with minimum foaming and at low temperatures. Additional detergents are rarely needed with this product, unlike many competing phosphate processes. The resulting phosphate coating has a weight of 0.2 to 0.4g/m2. The degreasing and conversion takes place in a multi-stage conveyor or box wash process, involving cleaning and phosphating by spray application of the Bonderite M-ZN 606 solution followed by water rinsing and a final Bonderite M-PT rinse product. Application temperature is between 25-50C and spraying at 1-2 bar takes just 1-4 minutes. Bonderite M-ZN 606 is supplied as a concentrated liquid which lends itself to easy handling by manual or automatic control systems. Dilution is approximately 11 litres in a 1000 litre water bath.