Reason for use:
To reinforce Fluoropolymer coating with a hard Ceramic coating
The application of Plasma sprayed ceramic 99216 as a reinforced coating has been proven to increases the working life of many types of cookware. Even above that achieved by Arcsprayed Stainless Steel (LE-WR-002).
Introduction to Plasma Sprayed Ceramic Coating
By producing a thin Plasma sprayed layer the fluoropolymer coating penetrates the sprayed surface. This produces high bond strengths and allows the high wear resistant ceramic to protect the fluoropolymer coating (See Fig 1) from such items as cooking utensils.
Main Deposit: 99216 Ceramic Powder
PLASMA SPRAY PROCESS
The surface should be free from grease, oil or other contaminants as this would affect the adhesion of the sprayed coating.
The surface should be grit blasted; the standard of surface cleanliness required is as Swedish Standard SA3. Surfaces not being treated should be masked before blasting.
Application of Sprayed Ceramic Coating
(A) The Plasma Equipment should be set up in accordance with the Metallisation Manual for the spraying of St/St or Titanium wire.
(B) The Area to be sprayed should be cleaned with a clean air blast to remove any loose particles of grit.
(C) The Plasma Pistol should be set so that the spray stream is at 90° to the surface being coated and traversed at an even speed giving a uniform coating.
(D) Apply Ceramic Coating to the required thickness.
(E) Spraying Parameters 99216
a) Adjust Secondary Gas to achieve Voltage.
b) Adjust Rpm to achieve Powder Feed Rate GPM
c) Air Jets at 80 psi Parallel
There should be the minimum of interruption from commencement of preparation to completion of spraying. At all times, the prepared surface should be protected from dust, dirt, moisture etc.
REFERENCE TECHNICAL BULLETIN N°S :-
LE-WR-002 Arcsprayed Reinforced Coating System for Cookware
18.104.22.168 Metallisation 87/13 Alumina Titanium Ceramic Powder 99216