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Cool-Phos from Stowlin Croftshaw is a low-temperature dynamic cleaning and phosphating process that is claimed to create a very clean surface at low environmental cost.

The process creates a layer of pure phosphate on the surface of the component, which improves the adhesion of subsequent coatings and provides a good mechanical bond between the paint film and the metal.

The Cool-Phos process is similar to that used in regular vapour degreasing, with a couple of additional stages, and involves immersion in the boiling Cool-Phos solvent followed by spray rinsing with clean distilled solvent.

As Cool-Phos has a boiling point of 38C, energy consumption is low, according to the company.

The liquid is stable, biodegradeable and non-flammable.

It is ozone friendly and has no greenhouse-gas potential.

In addition, it does not contribute to low-level atmospheric ozone.

Cool-Phos plant can be fabricated by any plant manufacturer, and full support and back-up is provided by Stowlin Croftshaw.

Only one process tank is required, with no secondary drying oven, so plant costs are also low.

Operator training is included in the cost of Cool-Phos, and regular site visits by the company’s technical service engineers and regular laboratory analysis are provided.

One-site quality control is said to be straightforward.

The Cool-Phos process may be applied to many metals, although mild steel, aluminium and zinc are the most commonly treated.

The process gives these metals a surface etch for a deep clean.

The one-dip, four-stage, non-aqueous process usually takes around four to eight minutes, leaving treated parts cool and dry.

The main ingredient of Cool-Phos is dichloromethane, along with phosphoric acid and other solvents.

The phosphate layer deposited by Cool-Phos protects the metal from moisture, which means that no additional protection is necessary during subsequent storage.

Stowlin Croftshaw

The Stowlin Croftshaw group has more than 75 years' experience supplying high-quality innovative cleaning solutions, processes, metal cleaning machines, basic chemicals and solvents.

We are committed to the responsible and ethical management of our products and this combined with our unrivalled technical expertise, make us the supplier of choice.

As well as offering a comprehensive range of commodity chemicals and solvents, we also supply our own trademark speciality cleaning and phosphating products, such as Cool-Phos and Vaposol. In addition, we supply advanced aqueous, non-aqueous and vapour degreasing products in our capacity as national distributors for world-class companies such as Petroferm, Mykal and Henkel.

We offer a wide range of ancillary services including contract blending and packing, controlled waste disposal, supply and installation of metal cleaning equipment and chemical storage tanks, in-house technical support and on-site demonstration facilities. We also offer advice with respect to current legislation.

Our market sectors include many small to large companies operating in the electronics, aerospace, medical, optical and military industries. Other areas include general metal treatment, food processing, effluent treatment, janitorial, hygiene and swimming pool chemistry.

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