handling anodized surfaces

DEFINITION

LIMIT SAMPLES

For limit samples, the upper and lower characteristic value of a certain quality is defined as a target.
The limit values for the color spectrum (light / dark) apply to the anodizing process described here.

All profiles that fall within the color spectrum shown meet the requirements and do not constitute a reason for complain. The assessment of the flawlessness of the visible surface is carried out after anodizing on the basis of DIN 17611:2022-08 or the VFF Merbklatt AL.03:2016-08 visual assessment of anodically oxidized (anodized) surfaces on aluminium.

COLOR SAMPLE = GUIDE SAMPLE

With color or guide samples, there are no limits for an upper or lower characteristic value in the color spectrum. For this reason, there is only 1 color sample that serves as a guide to the color tone. Deviating color shades of the delive- red material compared to a received color or reference sample do not constitute grounds for complaint.

GENERAL OVERVIEW OF COMMON COLOR SHADES

GUTMANN		EURAS		according to DIN 17611
Designation	corresponds to	Designation	Color shade	Designation	Color shade
EV1	ca.	C-0	neutral	EV1	natural ton
—	ca.	C-31	light bronze
G212	ca.	C-32	light bronze
G214	ca.	C-33	middle bronze	EV4	middle bronze
G216	ca.	C-34	dark bronze	EV5	dark bronze
G220	ca.	C-35	black	EV6	black
				EV2	nickel silver light
				EV3	gold

GENERAL INFORMATION ABOUT THE SURFACE FINISH

according to DIN 17611	Description	Surface appearance
E0	Degreasing and deoxidizing	Drawing marks, scratches, grinding marks or other surface defects remain visible
E1	Grinded	Uniform, matt-looking surface, small drawing marks or scratches are removed
E2	Brushed	Homogeneous bright surface, drawing marks, scratches, file marks only partially removed
E3	Polished	Shiny surface, drawing marks, scratches, file marks are only partially removed
E4	Grinded and brusched	Homogeneous glossy surface, mechanical surface defects are removed
E5	Grinded and polished	Smooth, shiny appearance, mechanical surface defects are removed
E6	Chemically pre-treated, pickling	Matt, rough surface. Drawing marks, scratches, file marks are partially evened out. Material-related changes in surface appearance cannot always be avoided.
E7	Chemically / electrochemically polished	High-gloss surface, surface defects are only partially eliminated
E8	Polished and chemically/electrochemically polished	High-gloss surface, mechanical surface defects are generally eliminated

POSSIBLE COMBINATIONS OF SURFACES AND COLORS

The following color and surface combinations are offered as standard:

COMBINATIONS OF SURFACES AND COLORS
GUTMANN	EURAS	AS		BBS		MVS
		Guide sample | Sheet	Limit sample | Profile	Guide sample | Sheet	Limit sample | Profile	Guide sample | Sheet	Limit sample | Profile
E6 / EV1	C-0	Art.-No.: 75017		Art.-No.: 75017		Art.-No.: 75017
E6 / G212	C-32	Art.-No.: 75023	on request	Art.-No.: 75023	on request	Art.-No.: 75023	Art.-No.: 75073
E6 / G214	C-33	Art.-No.: 75019	on request	Art.-No.: 75019	on request	Art.-No.: 75019	Art.-No.: 75073
E6 / G216	C-34	Art.-No.: 75026	on request	Art.-No.: 75026	on request	Art.-No.: 75026	Art.-No.: 75073
E6 / G220	C-35	Art.-No.: 75022	on request	Art.-No.: 75022	on request	Art.-No.: 75022	Art.-No.: 75073
E6 / EV2	external production	Art.-No.: E006395	on request	Art.-No.: E006395	on request	Profile: E00340	on request
E6 / EV3	external production	Art.-No.: E006396	on request	Art.-No.: E006396	on request	Profile: E006341	on request
E6 / C31	external production	Art.-No.: E006394	on request	Art.-No.: E006394	on request	Profile: E006339	on request

REMARKS ON THE POSSIBLE COMBINATIONS OF SURFACES AND COLORS

• Other colors such as Sandalor, Colinal, Granodal, etc. on request.
• Guide samples are always produced as sheet metal, even if the subsequent application is a profile. Exception: limit samples E6 / EV2, E6 / EV3 and E6 / C31 are available on profiles.
• Please note the delivery times of approx. 10 working days plus tour for limit samples not kept in stock.
• Limit samples are availabe at a price. Prices for non-stocked limit samples on request.
• The standard value for the thickness of the oxide layer for color samples and limit samples is normally class 20 according to DIN 17611, table 2. Any deviating layer thicknesses must be requested separately.

GENERAL INFORMATION FOR THE MANUFACTURER

Before ordering anodized surfaces, the following instructions must be considered by the manufacturer:

• Color samples are to be used as a reference value. In addition to the anodizing treatment, the surface condition and the properties of the semi-finished product used, such as the alloy, the tempering condition and the material thickness, also play a role in determining the colour. Color deviations are therefore also batch-related and depen- dent on the primary material.
• It is recommended, in case of a specific order beyond the reference samples, to order limit samples in decorative anodizing quality „EQ“ separately for rolled and extruded products and to refer the material order for the project to these. Please note the delivery times and that these limit samples are subject to a charge.
• Orders for limit samples should always include the following information specified by the manufacturer:
  • Name of the construction project
  • Definition of the articles
  • Total quantity in m2
  • Total period of the construction project

EXAMPLE:
Profile Item no: ______ DIN EN 12020-1 EN AW-6060 T66-EQ-E6/C33 according to limit sample from xx.xx.xxxx
Sheet ______________ DIN EN 485-2 EN AW-5005-H14-EQ-E6/C33 according to limit sample from xx.xx.xxxx

• Anodized surfaces are cleaned with warm water to which a chlorine-free cleaning agent (e.g. washing-up liquid) has been added. Only a cloth or sponge and water should be used. For heavily dirty surfaces, the use of special anodizing cleaners is recommended, the cleaning effect of which is achieved by abrasive substances.
  In this case, the anodizing cleaner Alu Polish can be used (Article number: 122040011).