Corrosion Test on Hard Surfaces

Test done in Germany

The materials were subject to a contact time of 14 days in each case (continuous stress conditions).

Material
Uniform loss in weight [mg/(day·m²)]
Loss in thickness [mm/year]
Assessment according
to DIN 50905
Gr. 304 S 15
1.8
0.0008
very resistant
Gr. 316 S 16
> 1.0
> 0.00001
very resistant
Gr. 321 S 12
> 1.0
> 0.00001
very resistant
Gr. 320 S 17
> 1.0
> 0.00001
very resistant
Aluminum 99.5
10.7
0.0013
very resistant in practice
Al-Mg-Si 1,0
82.1
0.01
resistant in practice
Copper
591.1
0.024
sufficient resistant in practice
Brass
385.7
0.017
sufficient resistant in practice
Tin
3.6
0.00017
very resistant
Zinc
3683.9
0.19
limitedly resistant in practice
Iron, ST 1.0037
4912.5
0.23
not resistant
Chrome plated
23.2
0.0012
very resistant in practice
Nickel plated
1.8
0.00007
very resistant