Niplate 500 is a high-phosphorus electroless nickel plating (10-13% in P).
It is preferable to other Niplate coatings in case of contact with foods and when resistance to aggressive chemical agents is required.
Excellent chemical and corrosion resistance
Thanks to the high chemical resistance of the coating and complete surface covering, the pieces treated with Niplate 500 are protected against corrosion and aggressive chemical substances.
Uniform and constant thickness over the entire surface, including holes, ideal for precision mechanical engineering pieces with reduced tolerances.
Applicable on various metals
All the most common alloys used in mechanical engineering can be coated – iron, copper and aluminium alloys.
The surface hardness of Niplate 500 varies according to the hardening heat treatment performed after layer deposition.
Dehydrogenation 160-180°C x 4 hrs
Hardening 270-280°C x 8 hrs
Hardening 340°C x 4 hrs
For applications where the part undergoes wear, the use is recommended of Niplate 600 instead of Niplate 500. Niplate 500 nevertheless has good wear resistance depending on the heat treatment performed.
Approximate wear value, TWI-CS10
A low number indicates a better performance – ASTM B733 X1 – Taber Abraser wear test – abrasive wheels CS 10 – load 1 kg
The corrosion protection of Niplate 500, assessed by means of salt mist test, depends on the base material, piece machining and finishing and the thickness of the applied coating.
Approximate corrosion resistance values
NSS according to ISO 9227 – Thickness 20 μm – corroded surface < 5%
Excellent chemical resistance and to oxidization in many aggressive salt environments.
Passes the concentrated nitric acid immersion test (RCA, Nitric acid test – Concentrated nitric acid 42Bé, 30 seconds, room temperature).
Approximate values of compatibility with the coating environment only, they do not indicate corrosion protection of the base material. The overall performance of the coated piece depends to a large extent also on the type and quality of the base material. The actual resistance to the environment must in any case be tested in the field.
Hydrocarbons (e.g. petrol, diesel fuel, mineral oil, toluene)