Std Finish Codes
According to ISO 4042/2081 DIN 267/9: A2 L According to SS: 3191/2968 Fe/Zn 5 c
SVG std 2000, Revision 2
| SVF std 2000, Revision 2 | ISO 2081 | DIN 50979 | ISO 4042 | |
|---|---|---|---|---|
| 5 micron zinc on steel, blue chromated | Fe/Zn5/C1 | Fe/Zn5/A | A2B | |
| 8 microns of zinc on steel , yellow chromated | Fe/Zn8/C2 | Fe/Zn8/C | A3c | |
| 12 microns zinc to steel, green chromating | Fe/Zn12/C3 | Fe/Zn12/D | A4D | |
| 15 microns zinc on steel , black chromating | Fe/Zn15/C4 | Fe/Zn15/F | A5R | |
| 8 microns zinc on steel, blue passivation | Fe/Zn8/P1 | Fe//Zn8//An//T0 | A3B(+ELV/RoHS) | |
| 8 microns of zinc on steel, yellow passivation | Fe/Zn8/P2 | Fe//Zn8//An//T0 | A3C | |
| 8 microns of zinc on steel, green passivation | Fe/Zn8/P3 | A3D | ||
| 8 microns of zinc on steel, black passivation – with sealer | Fe/Zn8/P4/T2 | FE//Zb8//Fn//T2 | A3R | |
| 8 microns of zinc on steel, iridescent passivation | Fe/Zn8/P5 | Fe//Zn8//Cn//T0 | A3A | |
| 8 micron zinc – nickel on steel , black passivation – no sealer | Fe/ZnNi8/P4 | Fe//ZnNi8//Fn//T0 | P3R | |
| 8 micron zinc – nickel on steel , black passivation – with sealer | Fe/ZnNi8/P4/T2 | Fe//ZnNi8//Fn//T2 | P3R | |
| 8 micron zinc – nickel on steel, iridescent passivation | Fe/ZnNi8/P5 | Fe//ZnNi8//Cn//T0 | R3A | |
| 12 micron zinc-iron to steel, black passivation – no sealer | Fe/ZnFe12/P4 | Fe//ZnFe12//Fn//T0 | R4R | |
| 12 micron zinc-iron to steel, black passivation – with sealer | Fe/ZnFe12/P4/T2 | Fe//ZnFe12//Fn//T2 | R4R | |
| 12 micron zinc-iron to steel, iridescent passivation | Fe/ZnFe12/P5 | Fe//ZnFe12//Cn//T0 | R4A |
Corrosion grade
| Grade | Example of use | Designation of the surface treatment | Requirements / NSS (ISO 9227) | |||
|---|---|---|---|---|---|---|
| White rust | Base metal corrosion | |||||
| Thin-film passivation |
Thick film passivation | Thin-film passivation | Thick film passivation | |||
| 0 | Decorative | Fe/Zn5/P1 Fe/Zn5/P4 |
6 24 |
48 72 |
||
| 1 | Indoor Hot and dry |
Fe/Zn5/P2, Fe/Zn5/P5, Fe/Zn8/P1, Fe/Zn8/P4 |
6 24 |
72 | 72 96 |
120 |
| 2 | Indoor May be exposed to humidity |
Fe/Zn8/P1, Fe/Zn8/P2, Fe/Zn8/P5 | 72 | 144 | ||
| 3 | Outdoor moderate corrosive loading |
Fe/Zn12/P1, Fe/Zn12/P2, Fe/Zn12/P5 Fe/Zn8/P4 Fe/ZnFe8/P4 Fe/ZnFe8/P5 |
72 144 144 200 |
216 266 266 320 |
||
| 4 | Outdoor High corrosive loading Marina and / or industrial environments |
Fe/ZnNi8/P5, Fe/ZnNi8/P4 | >200 | >700 | ||
Finishing with a sealer , T2, can provide an improvement in corrosion protection . This applies to both time to white rust and metal corrosion .
The table refers to surface treatment on racks of reference plates.
Treatment of the drum may lead to slightly lower values .
Testing in neutral salt spray, NSS, should only be used as verification of process .
This nomenclature standard aims to complement and clarifying the standards laid EN ISO 2061 and EN 147000.
In cases where the issues listed in EN ISO 2061 and EN 147000 are not addressed in this standard it applies to both standards listed requirements.
Chromate
Converting layer containing chromates , hexavalent chromium . This type of treatment does not meet the requirements of the RoHS and ELV .
Passivation
Converting layer which is free of hexavalent chromium . May contain trivalent chromium.
Descriptions of chromating and passivation
|
Containing hexavalent chromium
|
Free of hexavalent chromium |
After-treatment |
Designations for heat treatment |
Example:
1. Hydrogen expulsion of yellow chromated 8 microns of zinc on steel in 190 ° C for 12 hours , Fe / Zn8 / S (190 ) 12 / C2
2. Détente Treatment of steel part to be coated with yellow chromated 8 pm zinc PE / SR (200) 2 / Zn ( / C2
According to ISO 4042/2081 DIN 267/9: A2 L
(Källa DIN 267/9)
According to SS: 3191/2968 Fe/Zn 5 c
Standardized coating thicknesses and designations
SS 3191/2968
|
Coating thickness µm
|
Designation
|
||||
|
Bright chromating
|
Yellow chromating
|
Green chromating
|
Black chromating
|
Without chromating
|
|
|
5
|
Fe/Zn 5 C1
|
Fe/Zn 5 C2
|
Fe/Zn 5 C3
|
Fe/Zn 5 C4
|
Fe/Zn 5
|
|
8
|
Fe/Zn 8 C1
|
Fe/Zn 8 C2
|
Fe/Zn 8 C3
|
Fe/Zn 8 C4
|
Fe/Zn 8
|
|
12
|
Fe/Zn 12 C1
|
Fe/Zn 12 C2
|
Fe/Zn 12 C3
|
Fe/Zn 12 C4
|
Fe/Zn 12
|
|
15
|
Fe/Zn 15 C1
|
Fe/Zn 15 C2
|
Fe/Zn 15 C3
|
Fe/Zn 15 C4
|
Fe/Zn 15
|
|
20
|
Fe/Zn 20 C1
|
Fe/Zn 20 C2
|
Fe/Zn 20 C3
|
Fe/Zn 20 C4
|
Fe/Zn 20
|
|
25
|
Fe/Zn 25 C1
|
Fe/Zn 25 C2
|
Fe/Zn 25 C3
|
Fe/Zn 25 C4
|
Fe/Zn 25
|
The designation comprises:
a) the chemical symbol Fe, for the basis metal (iron or steel) followed by an oblique stroke, Fe/
b) the chemical symbol for zinc, Zn
c) a number indicating the minimum thickness, in micrometers, of the zinc coating
d) symbols indicating the designation of the chromate conversion coating where:
C1 = bright chromating
C2 = yellow chromating
C3 = green chromating
C4 = black chromating
(Source SS 3191/2968)
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