WMV

revistimenti di nichelGalvanisch Nickeltechnisch hardnikkel

Ductile technical hard nickel with repair capability


Technical hard nickel plating can offer (thick) full bond nickel layers with micro-defect repair capability. These characteristics are vital for obtaining (multi
layer) coatings with high corrosion resistance and overhaul capability.




 

Possibilities with technical unalloyed hard nickel plating:

By means of modern preparation and plating techniques we can obtain very smooth (intermediate) ductile nickel coatings with the capability of sealing steel completely and of obtaining thick coatings for repair purposes. Steel is non-homogeneous and mostly contains micro-defects. This is not the most suitable
substrate for hard corrosion resistant mono layer coatings (such as hardened Lunac, HVOF ceramics or hard chromium) to protect steel from corrosion. Unlike almost any other coating, Lunac coatings give a guaranteed full bond with this nickel substrate resulting in completely micro-crack free structure !













 

pore covering















The application of technical hard nickel is one of the very few
galvanic processes with good micrometer scale repair capability.










Important features and applications:ductile ceramic coating for hydraulics

  1. The multi layer technical hard nickel / Lunac system offers ultimate corrosion protection to parts in harsh environments such as marine or even submarine environments !


  2. Because the ductility of this coating is outstanding it offers an additional corrosion protection to parts that may be slightly damaged (indented) during service (last pictures), without losing its corrosion protection capability. (The hard top layer may possibly crack, without peeling off, while the intermediate nickel layer can elongate up to 30%).


  3. The WMV pre-treatment process offers the same unparalleled high degree of coating bond with the substrates as is the case with our Lunac coatings. This property allows the deposition of very thick repair or electroforming layers (> 500 µm / 0.02").









    repair by nikkel plating




  4. This calibration tube was conically worn by 700 µm / 0.028". With our high purity nickel plating process the tube was effectively renovated. Additionally 55 µm / 0.0021" Lunac 2+ was applied on top of this nickel to reduce the wear rate by a factor of 80.






    wear resistant ceramic coating for axles




    The high ductility of the intermediate nickel coating and full bond strength between the various layers is vital for applications in harsh environments. Offshore equipment (such as on-board hydraulics or dredging machinery) is highly subject to corrosion as well as a high risk of indentation. A slightly damaged part maintains its functionality by means of the ductile nickel sub layer that will still protect the part from corrosion.