As the name implies no electrical current is applied, instead a metallic coating is deposited from the controlled chemical reduction of a metal salt. The resulting product is uniform in thickness over all surfaces including threads, bores and recesses.
It is possible to coat almost all metals up to a thickness of 100 microns (.004”)

The standard of finish on the component is important as the coating reproduces the substrate surface finish.

The coating is relatively hard as plated (see below) but can be heat treated at low temperature to increase surface hardness to approx. the same as hard chrome.

‘High Phosphorous’ coatings have been shown to offer salt spray test durations in excess of 1000 hours

• Barrel Plating
• Heat Treatment
• Bead Blast

                                                                   Medium Phos.          High Phos.

• Density                                               8.1 g/cm³                 7.8 g/cm³
• Phosphorus Content                      6 – 9 % by weight    10 – 12 % by weight
• Hardness [as plated]                     525 – 600 HK 100      475 – 550 HK 100
•     [Heat treated @ 400 °C 1 hour]   850 – 950 HK 100     800 – 950 HK 100
• Wear Resistance [as plated]              16 – 20 TWI *            18 – 24 TWI *
•     [Heat treated @ 400 °C 1 hour]       10 – 14 TWI *            10 – 15 TWI *
• Magnetic Tendency                                Slight                        Non
• Electrical Resistivity                         60 – 90 µΩ/cm         80 – 110 µΩ/cm
• Corrosion Resistance                             Good                     Excellent

* Taber Wear Index = weight loss in mg / 1000 cycles

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