Phosphating/Chromating

Protect Your Work and Maintain a Brilliant Finish.

Coating a metal surface is crucial to it's longevity, so treat your work with one of our coatings to ensure the best corrosion resistance.

Phosphating

Phosphate coatings are used on steel parts for corrosion resistance, lubricity, or as a foundation for subsequent coatings or painting. It serves as a conversion coating in which a dilute solution of phosphoric acid and phosphate salts is applied via spraying or immersion and chemically reacts with the surface of the part being coated to form a layer of insoluble, crystalline phosphates. Phosphate conversion coatings can also be used on aluminium, zinc, cadmium, silver and tin.

The main types of phosphate coatings are manganese, iron and zinc. Manganese phosphates are used both for corrosion resistance and lubricity and are applied only by immersion. Iron phosphates are typically used as a base for further coatings or painting and are applied by immersion or by spraying. Zinc phosphates are used for corrosion resistance (phosphate and oil), a lubricant base layer, and as a paint/coating base and can also be applied by immersion or spraying.

Confederate Chemicals offer a range of phosphating solutions and ancillary treatments.

IRON PHOSHATES

These are used by spray or immersion, where maximum gloss is required. They produce a lightweight amorphous coating. Iron phosphates are principally used to coat steel components, but they will produce light conversion coatings on aluminium and zinc. They are usually used with a detergent in multi stage cleaner/ phosphate lines.

SUPERFOS FD Molybdic acid accelerated product,principally for use on steel. Fluoride modified for multi metal applications. SUPERFOS FD contains surfactants for cleaning the work.

SUPERFOS FEL(F) Our highly concentrated product for maximum economy in use. SUPERFOS FEL(F) is not detergented as received. It is Molybdic Acid accelerated,and fluoride modified for use in steel only applications, or mixed metal lines. SUPERFOS FEL(F) is used in conjunction with SUPERFOS ADDITIVE where it is used as a cleaner/ phosphate.

SUPERFOS FHF

Principally used by immersion, SUPERFOS FHF is a "high build" iron phosphate. It contains Ludigol to give heavier coating weights on difficult steels.

SUPERFOS TN

Is a titanium/iron phosphate principally used as an environmentally friendly alternative to chromating aluminium.

ZINC PHOSPHATES

HIIFOS Z A simple and economical, nitrite accelerated zinc phosphate for use in steel coating lines, either by spray or immersion.

SUPERFOS CM

Calcium modified zinc phosphate for immersion use in steel coating lines, where a heavy alkaline cleaner or a strong acid pickle have ben used prior to phosphating. SUPERFOS CM produces a soft "satin" coating of zinc/calcium phosphate.

SUPERFOS IM/R

Heavy duty zinc phosphate, typically run with "free iron" to give coarse and heavy coatings prior to staining and oiling operations,.

SUPERFOS TRC

Our most sophisticated pre paint phosphate, a manganese/zinc/iron "tricat" phosphate producing light weight coatings on stel and mixed metals.

Chromating

Chromate conversion coating is a type of conversion coating used to passivate steel, aluminum, zinc, cadmium, copper, silver, magnesium, and tin alloys. It is primarily used as a corrosion inhibitor, primer, decorative finish, or to retain electrical conductivity. The process is named after the chromate found in chromic acid, also known as hexavalent chromium, the chemical most widely used in the immersion bath process whereby the coating is applied. However, hexavalent chromium is toxic, thus, highly regulated, so new, non-hexavalent chromium-based processes are becoming more readily available at a commercial level. One alternative contains trivalent chromium. In Europe the RoHS (Restriction of Hazardous Substances) Directive is commonly referred to regarding elimination of hexavalent chromium in electrical and electronic equipment, and the REACH ("Registration, Evaluation, Authorisation and Restriction of Chemicals") Directive to wider applications including chromate conversion coating processes, paint primers and other preparations.

Chromate conversion coatings are commonly applied to everyday items such as hardware and tools, and can usually be recognized by their distinctively iridescent, greenish-yellow color.

Our Federcrom range provide high quality chromating solutions.

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