Corrosion and Resistance

All metal surfaces are affected by corrosion. Depending on the physical properties of the metal and the environment to which it is exposed, chemical or electromechanical corrosion may occur..

Atmospheric Corrosion

Atmospheric corrosion occurs when metal is exposed to airborne liquids, solids or gases.

Chemical Corrosion

Chemical corrosion takes place when metal comes in direct contact with a corrosive solution.

Storage Corrosion

Wet storage stain (White rust) is caused by the entrapment of moisture between surfaces of closely packed and poorly ventilated material for an extended period. Wet storage stain is usually superficial, having no affect on the properties of the metal.

Galvanic Corrosion

Galvanic corrosion occurs when two or more dissimilar metals come in contacts with the presence of an electrolyte (ie. moisture).

 

AVERAGE ANNUAL;

ZINC COATING

ZINC COATING

ZINC COATING

ZINC COATING

           
 

LOSS OF ZINC COATING

210 M2

280g M2

560g M2

700g M2

COUNTRY

11g/M2

20 years

31 years

-

-

CITY AIR

30g/M2

8 years

11 years

20 years

25 years

SEA AIR

40g/M2

8 years

10 years

20 years

23 years

INDUSTRIAL AIR

60g/M2

-

-

12 years

14 years

Average Protection life (year)

       
   

Choice of material or implementation depending on the environment

 
       
 
     

INOX STAINL

INOX STAINL

ALU

           

AMBIANCES ENVIRONMENT

EZ

GAC

304

316

AG 3

INTERIOR

 **

 

 ***

 ***

 ***

EXTERIOR - URBAN

 *

 **

 ***

 ***

 ***

EXTERIOR - INDUSTRIAL

 

 *

 *

 **

 *

EXTERIOR - MARINE

 

 *

 *

 **

 **

MINERAL ACIDS

 

 *

 *

 **

 *

ORGANIC ACIDS

 

 *

 *

 **

 *

BASES

 

 *

 **

 *

 *

HALOGENS

   

 *

 ***

 *

HYDROCARBONS

 

 **

 **

 ***

 **

FOOD

 *

 

 *

 **

 **

 

 

 

 

 

 

 

 

 

 

 

Feedback