Walter Surface Technologies SURFOX 204 Manual de usuario descargar pdf (Pagina 4)

4 / surfox.com • SURFOX Weld Cleaning Systems

Passivation

Why is passivation important?

Stainless steel is able to resist corrosion thanks to a passive chromium oxide layer

that forms on its surface. The formation of this protective layer is called passivation.

Abrasion or excessive heat (caused by welding) will destroy this protective layer and

expose the metal to corrosion.

Beginning of passivation process End of passivation process

Passivation occurs when the

chromium contained in the

stainless steel comes in contact

with the oxygen in the air. This

chemical reaction forms a passive

chromium oxide layer, which will

protect the surface of stainless

steel. To form a thick and uniform

chromium oxide passive layer, the

surface of the parent material

must be perfectly clean and free

of any contaminants.

Mechanical abrasion, thermal

treatment, welding, salt, strong

acids and galvanic contamination

will damage the chromium oxide

layer and lead to unwanted

oxidation. In order to fully

restore the corrosion resistance

of stainless steel and avoid any

interference in the passivation

process, the heat tint as well as

other surface contaminants must

be removed.

SURFOX is a safe, effective and

fast electrochemical cleaning

system. The rate of cleaning

welds with this system is between

3-5 feet per minute.

The SURFOX system combines

both the cleaning power of

electrical current and the

passivation properties of

electroyte cleaning solutions.

Passivation instantaneously

begins after the SURFOX

electrochemical cleaning process

is completed. It usually takes

between 24 to 48 hours for

passivation to be completed and

stabilized.

Watch a short video about

passivation on your smart

phone.

Oxygen

Chromium

Protective oxide layer

Thickness:

1 to 5 nanometers

(1 to 10 molecules)

Stainless Steel

1 2 3 4 5 6 7 8 9 ... 15 16

Comentarios a estos manuales

Sin comentarios

Walter Surface Technologies SURFOX 204 Manual de usuario Pagina 4

Comentarios a estos manuales

Relacionado con productos y manuales para Sistema De Soldadura Walter Surface Technologies SURFOX 204