Niplate eXtreme is an electroless nickel plating developed specifically to increase corrosion resistance, especially on aluminium alloys.
Thanks to a research project, the nickel alloy deposition process parameters have been optimized in order to improve the performance of coated aluminium components. This is the background to the Niplate eXtreme treatment, which makes it possible to protect aluminium parts subject to corrosion and frequent wetting.
The coating has very low porosity and it increases salt spray resistance, limiting subsurface oxidation phenomena.
The coating can be applied to all aluminium alloys, from machined billets such as the 7000 and 2000 families employed in the aeronautical industry and in the racing sector (F1 and MotoGP), and cast and die cast alloys with high silicon contents.
Absence of porosity, excellent adhesion and high chemical resistance ensure Niplate eXtreme offers unparalleled corrosion resistance, especially on aluminium alloys. Makes it possible to reach 720 hours of neutral salt spray (NSS) without the onset of corrosion.
Unlike anodizing, the coating is composed of a metal film similar to stainless steel in colour. The coating retains its colour and bright appearance through time, thanks to its high chemical resistance.
The coating offers high surface hardness assuring scratch and wear resistance while maintaining aesthetic appearance and corrosion resistance properties unchanged.
Uniform and constant coating thickness over the entire surface, including holes; ideal for precision machined parts with tight tolerances and complex geometries.
|Ni-P alloy, high phosphorus electroless nickel plating|
|ISO 4527 | NiP|
|RoHS compliant. No restricted substances present in amounts greater than the maximum tolerated concentrations.|
|REACH compliant. No SVHCs present in amounts higher than 0.1% by weight.|
|Stainless steel||Pre-treatment||Sand blasting|
|Case hardened steel||Pre-treatment||Sand blasting|
|Nitrided steel||Pre-treatment||Sand blasting|
|Brass, Bronze, Copper||Adhesion||★★★★★|
|Pure titanium and titanium alloys||Pre-treatment||Sand blasting|
|Uniform thickness over the entire external and internal surface|
|Absence of tip effect typical of galvanic coatings|
|Bright stainless steel metallic appearance that reproduces the morphology of the machined part|
|Option of matt finish (sand blasted, shoot peened, or grit blasted)|
|Hardness value||Heat treatment|
|600±100HV||Hydrogen embrittlement relief at 160-180°C for 4h|
|For applications in which the part is subject to intense wear, the use of Niplate 600 is recommended in place of Niplate eXtreme. Niplate eXtreme anyway offers a good level of wear resistance.|
|Guideline wear value, TWI-CS10||Heat treatment|
|The lower the number, the higher the performance – ASTM B733 X1 – Taber Abraser wear test – CS 10 abrasive wheels – 1 kg load|
|20±2 mg / 1000 cycles||Hydrogen embrittlement relief at 160-180°C for 4h|
|Dynamic dry friction coefficient value|
|0.4 ÷ 0.6 depending on the antagonist material|
|The Niplate eXtreme coating offers higher salt spray corrosion
resistance than conventional electroless nickel plating treatments,
especially on aluminium alloys.|
The corrosion protection of Niplate eXtreme, assessed by means of the salt spray test, depends on the base material, machining and finish of the part, and on the applied film thickness.
|Guideline corrosion resistance values||Substrate material|
|NSS to ISO 9227 – Thickness 20 μm – corroded surface < 5%|
|≥240 hours||Carbon steel|
|≥500 hours||Aluminium 6082|
|Excellent chemical and oxidation resistance in highly aggressive saline
Passes the concentrated nitric acid immersion test (RCA nitric acid test: 42 degree Bé concentrated nitric acid, 30 seconds, ambient temperature).
|Chemical compatibility values are referred exclusively to the coating and do not define the corrosion protection of the substrate material. The overall performance of the coated part is highly dependent also on the type and quality of the substrate material. The actual environmental resistance must anyway be tested in the field.|
|Hydrocarbons (e.g. petrol, diesel, mineral oil, toluene)|
|Alcohol, ketones (e.g. ethanol, methanol, acetone)|
|Neutral saline solutions (e.g. sodium chloride, magnesium chloride, seawater)|
|Dilute reducing acids (e.g. citric acid, oxalic acid)|
|Acid oxidizing agents (e.g. nitric acid)|
|Concentrated acids (e.g. sulphuric acid, hydrochloric acid)|
|Dilute bases (e.g. dilute sodium hydroxide)|
|Base oxidizing agents (e.g. sodium hypochlorite)|
|Concentrated bases (e.g. concentrated sodium hydroxide)|
|Easily brazed using RMA, RA acid fluxes|
|Fusion point, solidus|