November 2007
DEUTSCHE NORM
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DIN 17611:2007-11
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Contents
Page
<3 4 2 4 5 4 Designing products 6 6 8 .9 8
Batching and scope of testing (10)
9 Transport, storage 10
<.11  Tables
Table 1 — Surface pretreatment 7 Table 2 — Minimum average and minimum local anodic oxidation 8 Table 3 — Number of test pieces for determining coating thickness.. (10)
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DIN 17611:2007-11
Foreword
This standard has been prepared by Technical Committee NA 066-01-09 AA Anodisch oxidiertes Aluminium of the Normenausschuss Nichteisenmetalle (Nonferrous Metals Standards Committee).
Amendments
This standard differs from DIN 17611:2000-12 as follows:
a) For alloying elements, the chemical symbol based designation system has been replaced by an
alphanumerical designation system.
b) The requirements for coating thickness have been rendered more precise and harmonized with
DIN EN 12373-1.
c) The standard has been editorially revised.
Previous editions
DIN 17611: 1964-05, 1969-06, 1981-12, 1985-06, 2000-12
DIN 17612: 1969-06
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DIN 17611:2007-11
1Scope
This standard specifies the technical delivery conditions for anodized aluminium and wrought aluminium alloy products used in the metalworking industry. Anodizing creates an oxide coating on the surface of aluminium, protecting it more effectively from corrosion, and making durable decorative effects produced using a treatment as in Table 1.
For the purposes of this standard, semi-finished aluminium products are
—  sheet, strip and plate as in DIN EN 485-1;
—  cold drawn rod, bars and tube as in DIN EN 754-1;
—  extruded rod, bars, tube and profiles as in DIN EN 755-1;
—  extruded precision profiles as in DIN EN 12020-1.
This standard does not cover
—  products with coatings produced by hard anodizing;
—  products with coatings produced by batch or coil anodizing;
—
  products worked after anodizing.
2 Normative references
The following reference documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
DIN EN 485-1, Aluminium and aluminium alloys — Sheet, strip and plate — Part 1: Technical conditions for inspection and delivery
DIN EN 573-3, Aluminium and aluminium alloys — Chemical composition and form of wrought products — Part 3: Chemical composition
DIN EN 754-1, Aluminium and aluminium alloys — Cold drawn rod/bar and tube — Part 1: Technical conditions for inspection and delivery
DIN EN 755-1, Aluminium and aluminium alloys — Extruded rod/bar, tube and profiles — Part 1: Technical conditions for inspection and delivery
DIN EN 12020-1, Aluminium and aluminium alloys — Extruded precision profiles in alloys EN AW-6060 and EN AW-6063 — Part 1: Technical conditions for inspection and delivery
DIN EN 12373-4, Aluminium and aluminium alloys — Anodizing — Part 4: Estimation of loss of absorptive power of anodic oxidation coatings after sealing by dye spot test with prior acid treatment
DIN EN 12373-5, Aluminium and aluminium alloys — Anodizing — Part 5: Assessment of quality of sealed anodic oxidation coatings by measurement of admittance
DIN EN 12373-7, Aluminium and aluminium alloys — Anodizing — Part 7: Assessment of quality of sealed anodic oxidation coatings by measurement of the loss of mass after immersion in phosphoric acid/chromic acid solution with prior acid treatment
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DIN 17611:2007-11
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DIN EN ISO 1463, Metallic and oxide coatings — Measurement of coating thickness — Microscopical method  DIN EN ISO 2360, Non-conductive coatings on non-magnetic electrically conductive basis materials — Measurement of coating thickness — Amplitude-sensitive eddy current method
3 Quality
3.1 Anodizing quality
Semi-finished products of anodizing quality (EQ) shall be ordered when a decorative finish after anodizing is required.
Semi-finished products for decorative anodizing shall meet specific requirements for chemical composition, manufacturing parameters, surface treatment, testing and packaging.
Sections which are to be joined to form a single surface after anodizing should be taken from the same batch to avoid variations in the subsequent finish.
The anodizing quality required shall be specially agreed at the time of ordering.
Suitable materials for anodizing are, for example, the following grades as specified in DIN EN 573-3: S
eries 1000 — Al Series 5000 — Al Mg Series 6000 — Al MgSi EN AW-1050A [Al 99,5] EN AW-5005 [Al Mg1(B)] EN AW-6060 [Al MgSi] EN AW-1070A [Al 99,7] EN AW-5005A [Al Mg1(C)] EN AW-6063 [Al Mg0,7Si] EN AW-1080A [Al 99,8(A)] EN AW-5050 [Al Mg1,5(C)]  EN AW-5051A [Al Mg2(B)]
EN AW-5754 [Al Mg3]1)
The surface appearance of semi-finished products shall be in accordance with the technical delivery conditions given in the relevant standards (see clause 1).
The intended surface treatment (see Table 1) and the anodizing method to be used (see 5.3) shall be stated when ordering.
Example of ordering details:
editoriallyProfile DIN EN 12020-1 EN AW-6060-T6-EQ-E6/C-33
The designation of a semi-finished product shall be in accordance with the appropriate standard, and shall also include the intended surface treatment as in Table 1.
1) EN AW-5754 [Al Mg3] cannot be unreservedly recommended for electrolytic coloration (two-stage process).
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