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
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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