TECHNICAL SPECIFICATION
SURFACE TREATMENT
Table of contents
Technical description – Electrolytic and chemical surface treatment .......................... 2
Electroplated coatings of zinc .................................................................................. 2
Standard................................................................................................................ 2
Additional information ......................................................................................... 2
Examples of designation ...................................................................................... 2
Electroplated coatings of zinc-iron .......................................................................... 3
Standard................................................................................................................ 3
Additional information ......................................................................................... 4
Examples of designation ...................................................................................... 4
Black oxidation ........................................................................................................ 5
Standard................................................................................................................ 5
Additional information ......................................................................................... 5
Electroplated coatings of nickel ............................................................................... 5
Standard................................................................................................................ 5
Additional information ......................................................................................... 5
Phosphatisation ........................................................................................................ 6
Standard................................................................................................................ 6
Date Checked Product TB number Rv
2018-06-27 em8cro
B
Author Approver Name 574 37 44-01
em9henj em9esg TECHNICAL SPECIFICATION
Page 1 of 6
,SURFACE TREATMENT
TECHNICAL SPECIFICATION
SURFACE TREATMENT
Technical description – Electrolytic and chemical surface
treatment
Electroplated coatings of zinc
Standard
Zinc electroplating shall be carried out in accordance with the requirements of SS-EN
ISO 2081:2008
Additional information
The following shall apply unless otherwise specified.
Type of information Requirements
Significant surfaces Unless otherwise specified on the drawing, the entire
surface of the component constitutes the significant
surface.
Suspension mark Suspension for surface treatment shall be carried out
as specified on the drawing. If this information is not
given, the person applying the surface treatment shall
minimise unavoidable marks after suspension.
Surface altera- Passification following zinc plating shall be carried
tion/passification out through a process which is free from hexavalent
chromium and which produces a layer free from
hexavalent chromium.
Heat treatment for hydrogen
expulsion
Breaking strength Heat treatment
o
190 – 230 C
2 No requirement
<1100 N/mm
2 8 hours
1100 – 1450 N/mm
2 18 hours
<1450 - 1800 N/mm
2 24 hours
<1800 N/mm
Examples of designation
Clear ) Electrodeposited coating TS 574 37 44 – Fe/Zn12/A
Iridescent ) Electrodeposited coating TS 574 37 44 – Fe/Zn12/C
Date Checked Product TB number Rv
2018-06-27 em8cro
B
Author Approver Name 574 37 44-01
em9henj em9esg TECHNICAL SPECIFICATION
Page 2 of 6
,SURFACE TREATMENT
TECHNICAL SPECIFICATION
SURFACE TREATMENT
Electroplated coatings of zinc-iron
Standard
Electroplating of zinc-iron alloys shall be carried out in accordance with the require-
ments of SS-EN ISO 2081:2008 subject to the following additions or amendments.
Area Requirements
Coating The coating shall consist of an alloy between zinc and iron
with an iron content of 0.8 – 1.2% iron by weight.
Designation Designation in accordance with ISO 2081:2008 to be ap-
plied with the exception that Zn is to be replaced by Zn-
Fe.
Corrosion properties After 200 hours in a neutral salt spray, the zinc-iron coat-
ing shall show no visible signs of corrosion.
Date Checked Product TB number Rv
2018-06-27 em8cro
B
Author Approver Name 574 37 44-01
em9henj em9esg TECHNICAL SPECIFICATION
Page 3 of 6
,SURFACE TREATMENT
TECHNICAL SPECIFICATION
SURFACE TREATMENT
Additional information
The following shall apply unless otherwise specified.
Type of information Requirements
Significant surfaces Unless otherwise specified on the drawing, the entire
surface of the component constitutes the significant
surface.
Suspension mark Suspension for surface treatment shall be carried out
as specified on the drawing. If this information is not
given, the person applying the surface treatment shall
minimise unavoidable marks after suspension.
Surface altera- Passification following zinc plating shall be carried
tion/passification out through a process which is free from hexavalent
chromium and which produces a layer free from
hexavalent chromium.
Heat treatment for hydrogen
expulsion
Breaking strength Heat treatment
o
190 – 230 C
2 No requirement
<1100 N/mm
2 8 hours
1100 – 1450 N/mm
2 18 hours
<1450 - 1800 N/mm
2 24 hours
<1800 N/mm
Examples of designation
Clear ) Electrodeposited coating TS 574 37 44 – Fe/Zn-Fe12/A
Iridescent ) Electrodeposited coating TS 574 37 44 – Fe/Zn-Fe12/C
Date Checked Product TB number Rv
2018-06-27 em8cro
B
Author Approver Name 574 37 44-01
em9henj em9esg TECHNICAL SPECIFICATION
Page 4 of 6
,SURFACE TREATMENT
TECHNICAL SPECIFICATION
SURFACE TREATMENT
Black oxidation
Standard
Black oxidation shall be carried out in accordance with the requirements of SS ISO
11408:2008
Additional information
The following shall apply unless otherwise specified.
Type of information Requirements
Significant surfaces Unless otherwise specified on the drawing, the entire
surface of the component constitutes the significant
surface.
Electroplated coatings of nickel
Standard
Nickel electroplating shall be carried out in accordance with the requirements of SS-
EN 12540:2000
Additional information
The following shall apply unless otherwise specified.
Type of information Requirements
Significant surfaces Unless otherwise specified on the drawing, the entire
surface of the component constitutes the significant
surface.
Suspension mark Suspension for surface treatment shall be carried out
as specified on the drawing. If this information is not
given, the person applying the surface treatment shall
minimise unavoidable marks after suspension.
Date Checked Product TB number Rv
2018-06-27 em8cro
B
Author Approver Name 574 37 44-01
em9henj em9esg TECHNICAL SPECIFICATION
Page 5 of 6
,SURFACE TREATMENT
TECHNICAL SPECIFICATION
SURFACE TREATMENT
Phosphatisation
Standard
Phosphatisation shall be carried out in accordance with the requirements of SS-EN
12476
Date Checked Product TB number Rv
2018-06-27 em8cro
B
Author Approver Name 574 37 44-01
em9henj em9esg TECHNICAL SPECIFICATION
Page 6 of 6
,SURFACE TREATMENT
