DIN EN ISO 2106-2011 Anodizing of aluminium and its alloys - Determination of mass per unit area (surface density) of anodic oxidation coatings - Gravimetric method (ISO 2106 2011).pdf

1、June 2011 Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 25

2、.220.20!$s)g“1800668www.din.deDDIN EN ISO 2106Anodizing of aluminium and its alloys Determination of mass per unit area (surface density) of anodicoxidation coatings Gravimetric method (ISO 2106:2011)English translation of DIN EN ISO 2106:2011-06Anodisieren von Aluminium und Aluminiumlegierungen Bes

3、timmung der Masse je Flcheneinheit (flchenbezogene Masse)von anodisch erzeugten Oxidschichten Gravimetrisches Verfahren (ISO 2106:2011)Englische bersetzung von DIN EN ISO 2106:2011-06Anodisation de laluminium et de ses alliages Dtermination de la masse par unit de surface (masse surfacique)des couch

4、es anodiques Mthode gravimtrique (ISO 2106:2011)Traduction anglaise de DIN EN ISO 2106:2011-06SupersedesDIN EN 12373-2:1999-02www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1206.11 DIN EN ISO 2106:2011-06 2 A comma is used as the

5、decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 79 “Light metals and their alloys”, Subcommittee SC 2/WG 15 “Anodic oxidation coatings on aluminium” (Secretariat: JISC, Japan) in collaboration with Technical Committee CEN/TC 132 “Aluminium and aluminiu

6、m alloys”, Working Group WG 15 “Aluminium anodisation” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Nichteisenmetalle (Nonferrous Metals Standards Committee), Working Committee NA 066-01-09 AA Anodisch oxidiertes Aluminium. Amend

7、ments This standard differs from DIN EN 12373-2:1999-02 as follows: a) the standard has been adopted as DIN EN ISO 2106:2011-06, and the main title has been modified (see National Annex NA); b) the standard has been editorially revised. Previous editions DIN 50944: 1969-03, 1979-01 DIN EN 12373-2: 1

8、999-02 DIN EN ISO 2106:2011-06 3 National Annex NA (informative) Correspondence between the previous standards series DIN EN 12373 “Aluminium and aluminium alloys Anodizing” and the corresponding new ISO and DIN EN ISO Standards Table NA.1 Correspondence previous now DIN EN 12373 DIN EN ISO Anodizin

9、g of aluminium and its alloys Part 1 7599 General specifications for anodic oxidation coatings on aluminium The title has been slightly changed Part 2 2106 Determination of mass per unit area (surface density) of anodic oxidation coatings Gravimetric method Part 3 2128 Determination of thickness of

10、anodic oxidation coatings Non-destructive measurement by split-beam microscope Part 4 2143 Estimation of loss of absorptive power of anodic oxidation coatings after sealing Dye spot test with prior acid treatment Part 5 2931 Assessment of quality of sealed anodic oxidation coatings by measurement of

11、 admittance Part 6 Part 7 3210 Assessment of quality of sealed anodic oxidation coatings by measurement of the loss of mass after immersion in phosphoric acid/chromic acid solution The title has been changed: with/without prior acid treatment Part 8 6581 Determination of the comparative fastness to

12、ultra-violet light and heat of coloured anodic oxidation coatings Part 9 Part 10 8251 Measurement of abrasion resistance of anodic oxidation coatings The title has been changed Part 11 7668 Measurement of specular reflectance and specular gloss of anodic oxidation coating at angles of 20 degrees, 45

13、 degrees, 60 degrees or 85 degrees Part 12 6719 Measurement of reflectance characteristics of aluminium surfaces using integrating-sphere instruments Part 13 7759 Measurement of reflectance characteristics of aluminium surface using a goniophotometer or an abridged goniophotometer The German title h

14、as been slightly changed Part 14 10215 Visual determination of image clarity of anodic oxidation coatings Chart scale method Part 15 3211 Assessment of resistance of anodic oxidation coatings to cracking by deformation Part 16 2085 Check for continuity of thin anodic oxidation coatings Copper sulpha

15、te test Part 17 2376 Determination of electric breakdown potential Part 18 8993 Rating system for the evaluation of pitting corrosion Chart method Part 19 8994 Rating system for the evaluation of pitting corrosion Grid method DIN EN ISO 2106:2011-06 4 This page is intentionally blank EUROPEAN STANDA

16、RD NORME EUROPENNE EUROPISCHE NORM EN ISO 2106 March 2011 ICS 25.220.20 Supersedes EN 12373-2:1998English Version Anodizing of aluminium and its alloys - Determination of mass per unit area (surface density) of anodic oxidation coatings - Gravimetric method (ISO 2106:2011) Anodisation de laluminium

17、et de ses alliages - Dtermination de la masse par unit de surface (masse surfacique) des couches anodiques - Mthode gravimtrique (ISO 2106:2011) Anodisieren von Aluminium und Aluminiumlegierungen - Bestimmung der Masse je Flcheneinheit (flchenbezogene Masse) von anodisch erzeugten Oxidschichten - Gr

18、avimetrisches Verfahren (ISO 2106:2011) This European Standard was approved by CEN on 28 February 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

19、 Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by tr

20、anslation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Fin

21、land, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES

22、KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2106:2011: EContents Page Foreword3 1 Scope 4 2 Principle4 3 Reagent.4 4 Apparatus .5 5 Procedure .5 5

23、.1 Preparation of test piece.5 5.2 Performance of the test.5 6 Expression of results 5 7 Test report 6 Annex A (informative) Recommended method for the drying of samples7 Bibliography 8 DIN EN ISO 2106:2011-06 EN ISO 2106:2011 (E) 2 Foreword The text of ISO 2106:2011 has been prepared by Technical C

24、ommittee ISO/TC 79 “Light metals and their alloys” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 2106:2011 by Technical Committee CEN/TC 132 “Aluminium and aluminium alloys” the secretariat of which is held by AFNOR. This European Standard shall be giv

25、en the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2011, and conflicting national standards shall be withdrawn at the latest by September 2011. Attention is drawn to the possibility that some of the elements of this document

26、 may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12373-2:1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound

27、 to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sw

28、eden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 2106:2011 has been approved by CEN as a EN ISO 2106:2011 without any modification. DIN EN ISO 2106:2011-06 EN ISO 2106:2011 (E) 3 1 Scope This International Standard specifies a gravimetric method for determining the mass p

29、er unit area (surface density) of anodic oxidation coatings on aluminium and its alloys. The method is applicable to all oxidation coatings formed by anodizing aluminium and its alloys, either cast or wrought, and is suitable for most aluminium alloys, except those in which the copper content is gre

30、ater than 6 %. NOTE 1 A high content of copper in the alloy can lead to increased dissolution of the basis aluminium. NOTE 2 If the thickness is known with sufficient precision (for example, using the method specified in ISO 2128), determination of the mass per unit area (surface density) of the coa

31、tings will enable its apparent density to be calculated. Conversely, if the conditions of application of the coating and its density are known, the determination of its mass per unit area (surface density) can permit calculation of the average mass and an approximate evaluation of the thickness (see

32、 the Note in Clause 6). 2 Principle The anodic oxidation coating on a weighed test piece of known surface area is dissolved without significantly attacking the basis metal, using a mixture of phosphoric acid and chromium(VI) of specified concentration. After dissolution of the coating, the test piec

33、e is reweighed, and the loss in mass is calculated. The mass loss is related to the unit area covered by the coating, and is expressed in milligrams of coating per square decimetre of surface. NOTE This is a destructive test . 3 Reagent Use only reagents of recognized analytical grade and only disti

34、lled water or deionized water. 3.1 Phosphoric acid/chromic solution, prepared as follows: phosphoric acid, 20= 1,7 g/ml: 35 ml; chromium(VI) oxide: 20 g; water: make up to 1 000 ml. WARNING Chromium(VI) is toxic and shall be handled properly. Chromium(VI) solutions are hazardous to the environment a

35、nd severely hazardous to waters. DIN EN ISO 2106:2011-06 EN ISO 2106:2011 (E) 4 4 Apparatus Usual laboratory apparatus and glassware, together with the following. 4.1 Laboratory balance, capable of weighing to an accuracy of 0,1 mg. 5 Procedure 5.1 Preparation of test piece The surface of the test p

36、iece to be tested shall have an area of between 0,08 dm2and 1 dm2, and the mass of the test piece shall not exceed 100 g. If the surface is dirty or impregnated with oil, grease or similar material, this shall be removed with the aid of a suitable organic solvent (see Annex A). To measure the mass o

37、f the coating on one surface only of the test piece, the coating on the other surface shall be removed by a mechanical or chemical process, leaving the significant surface intact. Alternatively, a protective agent, resistant to attack by the acidic test solution, shall be applied on the reverse surf

38、ace of the test piece. 5.2 Performance of the test Calculate the area of the surface covered by an anodic oxidation coating, weigh the test piece to the nearest 0,1 mg and immerse it in the phosphoric acid/chromic solution (see 3.1) for 10 min, at 95 C to 100 C, with efficient stirring. Rinse the te

39、st piece in water, dry and reweigh it (see Annex A). Repeat the immersion, drying and weighing until no further loss in mass is observed. NOTE The freshly made reagent will normally allow complete dissolution of the coating within 10 min. Its dissolving power diminishes with use; in general, 1 l of

40、solution is capable of dissolving 12 g of coating before the diminution becomes noticeable. 6 Expression of results Calculate the mass per unit area of surface (surface density) of the coating A, in milligrams per square decimetre, using Equation (1): 12AmmA= (1) where m1is the mass, in milligrams,

41、of the test piece before dissolution of the coating; m2is the mass, in milligrams, of the test piece after dissolution of the coating; A is the area, in square decimetres, effectively covered by the coating of which the mass is measured (without taking into account edges or other uncoated parts). NO

42、TE Where required, the average thickness of the coating, , in micrometres, can be estimated, using Equation (2): 10A= (2) where Ais the mass per unit area (surface density), in milligrams per square decimetre, of the coating; is the density, in grams per cubic centimetre, of the coating. DIN EN ISO

43、2106:2011-06 EN ISO 2106:2011 (E) 5 The density of the coating depends on the specific alloy, the anodizing and the sealing process. This density may vary, in normal processing conditions, between 2,3 g/cm3and 3 g/cm3. For thin oxidation coatings on aluminium and its alloys without copper, produced

44、under direct current in sulfuric acid solution, at a temperature of approximately 20 C, the density can be assumed to be equal to 2,6 g/cm3for sealed coatings and 2,4 g/cm3for unsealed coatings. The method gives only an approximate value of the thickness because of uncertainty about the density valu

45、e. The estimation of thickness is most accurate for thin coatings (10 m and less). 7 Test report The test report shall include at least the following information: a) a reference to this International Standard; b) the type and identification of the product tested; c) the result of the test (see Claus

46、e 6); d) anything unusual noticed during the determination; e) any operations not included in the procedure described in this International Standard, or considered to be optional; f) the date of the test. DIN EN ISO 2106:2011-06 EN ISO 2106:2011 (E) 6 Annex A (informative) Recommended method for the

47、 drying of samples A.1 Degrease the test piece by gentle agitation for 30 s in a suitable organic solvent at room temperature, remove, leave for 5 min in the ambient atmosphere (pre-drying), place in a drying oven preheated to 60 C and leave for 15 min with the coated surface standing upright. WARNI

48、NG Where organic solvents are used, carry out the degreasing operation and the pre-drying in a well-ventilated area to minimize exposure to solvent vapour. A.2 Allow the test piece to cool for 30 min over silica gel in a closed desiccator. A.3 After the acid treatment (see 5.2), repeat operations A.

49、1 and A.2, omitting the treatment in the organic solvent. DIN EN ISO 2106:2011-06 EN ISO 2106:2011 (E) 7 Bibliography 1 ISO 2128, Anodizing of aluminium and its alloys Determination of thickness of anodic oxidation coatings Non-destructive measurement by split-beam microscope DIN EN ISO 2106:2011-06 EN ISO 2106:2011 (E) 8