Phosphatation

PROCESS

Phosphating is a chemical conversion of steel that can be applied in bulk or on a fastener. Each type of phosphating offers very different characteristics: - Zinc phosphating: anti-corrosion and cold deformation properties - Manganese phosphating: anti-corrosion properties and improved friction properties - Calcium phosphating: adhesion of rubber to metals The process can be completed by oiling to optimise the anti-corrosion, anti-seizing or cold deformation properties of the phosphating. The processes used : - Barrel coatings (bulk) for small, medium and large series. - Attachment coatings for small and medium series.

CHARACTERISTIC OF THE DEPOSIT

- Thickness: 2 to 8µm (depending on type of phosphating and substrate)

- Corrosion resistance: temporary storage protection

- Substrate: steel and cast iron

- Colour: light to dark grey

- Electrical conductivity: YES

- Improvement of friction properties

- Adhesion to rubber

- Cold deformation

- Anti-seize improvement

FINISHES

- Organic mineral finishes (FOM or Top Coat) for bulk application

to meet the requirements of the automotive and aerospace industries

Aerospace industry:

- reinforced (increases corrosion resistance)

- lubricated (control of the friction coefficient)

- reinforced and lubricated (combines anti-corrosion and improved

coefficient of friction)

PRECISIONS

- Chromium-free process

- Possibility of carrying out tests :

- Salt spray EN ISO 9227 + D171058 (PSA and Renault)

- Thickness measurements X-ray fluorescence

- Adhesion

- Wettability

- Coating weight

- ...

- Test report

- Certificate of conformity