Engineered Surfaces for Exceptional Performance
Engineered Surfaces for Exceptional Performance

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Reinforced Coating System for Cookware

Ceramic Coating

Reason for use: To reinforce fluoropolymer coating with a hard Ceramic coating. The application of Plasma sprayed ceramic powder 216 as a reinforced coating has been proven to increases the working life of many types of cookware. Even above that achieved by Arc sprayed Stainless Steel. 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.

Fig 1

Equipment: Plasma Spray Equipment

Materials: Main Deposit: Ceramic Powder 216

Plasma Spray Process

Plasma is the term used to describe gas, which has been raised to such a high temperature that it ionises and becomes electrically conductive. In the case of Plasma Spraying, the Plasma is created by an electric arc burning within the nozzle of a plasma gun and the arc gas is formed into a plasma jet as it emerges from the nozzle. Powder particles are injected into this jet where they melt and then strike the surface at high velocity to produce a strongly adherent coating.

Method

Cleaning: The surface should be free from grease, oil or other contaminants as this would affect the adhesion of the sprayed coating.

Blasting: 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

Spraying should begin as soon as possible after preparation and before any visible sign of deterioration occurs.

  1. The Plasma Equipment should be set up in accordance with the MSSA Manual for the spraying of St/St or Titanium wire.
  2. The area to be sprayed should be cleaned with a clean air blast to remove any loose particles of grit.
  3. 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.
  4. Apply Ceramic coating to the required thickness.
  5. Spraying parameters for Ceramic Powder 216.

Note:

  1. Adjust secondary gas to achieve voltage.
  2. Adjust Rpm to achieve Powder Feed rate GPM.
  3. Air Jets at 80 psi parallel.

General

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.

Stainless Steel Coating

Reason for use: To reinforce the fluoropolymer coating with Stainless Steel. The application of Arc sprayed Stainless Steel as a reinforced coating has been proven to drastically increase the working life of many types of cookware. By producing a thin Arc sprayed layer the fluoropolymer coating penetrates the sprayed surface. This produces high bond strengths and allows the high wear resistant Arc sprayed coating to protect the fluoropolymer coating (See Fig 1) from such items as cooking utensils.

Equipment and Materials: Metallisation Arc Spray system, Energizer: S350, Main Deposit: Stainless Steel or Titanium.

Arc Spray Process

In the Arc spray process, the raw material in the form of a pair of metallic wires, are melted by an electric arc. This molten material is atomised by a cone of compressed air and propelled towards the work piece. The molten spray solidifies on the component surface to form a dense, strongly adherent coating.

Arc spray deposits possess a higher degree of bond strength than most other thermally sprayed deposits and the use of compressed air and electricity alone mean more economic coatings.

Method

Cleaning: The surface should be free from grease, oil or other contaminants as this would affect the adhesion of the sprayed coating.

Blasting: 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 Coating

Spraying should begin as soon as possible after preparation and before any visible sign of deterioration occurs. The surface speed should not be less than 18 metres/minute (60 feet per minute).

  1. The Arc spray equipment should be set up in accordance with the MSSA manual for the spraying of St/St or Titanium wire.
  2. The area to be sprayed should be cleaned with a clean air blast to remove any loose particles of grit.
  3. The Arc spray 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.
  4. Apply St/St or Titanium Coating to the required thickness.
  5. Spraying Parameters Titanium:
    1. Range 125mm (5”)
    2. Nozzle Air Pressure 5 Bar (72psi)
    3. Voltage before spraying 36 Volts
    4. Voltage during spraying 32 Volts
    5. Amperage 200 Amps
    6. Aircap 6843AF
  6. Spraying Parameters St/St:
    1. Range 125mm (5”).
    2. Nozzle Air Pressure 5 Bar (72psi).
    3. Voltage before spraying 29 Volts.
    4. Voltage during spraying 25 Volts.
    5. Amperage 200 Amps.
    6. Aircap 6843AF.

Note: Parameters may differ in accordance with type and length of power cables being used.

General

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.