There are 4 plating specifications recognised by the British Standards Institute, they are as follows:
BS 4601/1 a/b Service indoors.
BS 4601/2 a/b Service indoors in places where condensation may occur.
BS 4601/3 a/b Service outdoors in normal conditions.
BS 4601/4 a/b Service outdoors in exceptional severe corrosive conditions.
(see diagrams at base of page)
Provided the plastic is correctly moulded to the right specifications as detailed in the Borough guide to moulding and then etched to ensure good adhesion, a simple copper, nickel and chrome deposit is sufficient to meet these plating requirements.
The use of chromium plated plastic for bathroom or kitchen use i.e., high humidity environments, would normally demand higher deposits of nickel. For exterior use, particularly automotive components an entirely different approach, would be necessary. Where severe corrosion resistance is required, the use of semi-bright nickel is very important and deposits of micro-porous chrome would be recommended. This is especially important for automotive applications which need to meet stringent plating specifications, to deliver quality applications.
(please scroll down page for specification diagrams)
Chrome
Microporous Nickel
Nickel
Bright Nickel
Semi-Bright Nickel
Copper
ABS Substrate
Decorative Specification
Exterior Specification
Recommended Exterior
Recommended Exterior Specification for Extreme Conditions