1、June 2014 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 87
2、.040!%2c$“2156401www.din.deDDIN EN ISO 16927Paints and varnishes Determination of the overcoatability and recoatability of a coating(ISO 16927:2014);English version EN ISO 16927:2014,English translation of DIN EN ISO 16927:2014-06Beschichtungsstoffe Prfung der berarbeitbarkeit und berlackierbarkeit
3、einer Beschichtung(ISO 16927:2014);Englische Fassung EN ISO 16927:2014,Englische bersetzung von DIN EN ISO 16927:2014-06Peintures et vernis valuation des possibilits dapplication dune couche supplmentaire du mme produitou dun autre produit de peinture (ISO 16927:2014);Version anglaise EN ISO 16927:2
4、014,Traduction anglaise de DIN EN ISO 16927:2014-06SupersedesDIN 53221:2005-08www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 12 pages05.14 DIN EN ISO 16927:2014-06 2 A comma is used as the decimal marker. National foreword This documen
5、t (EN ISO 16927:2014) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes”, Subcommittee SC 9 “General test methods for paints and varnishes” (Secretariat: BSI, United Kingdom) in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany
6、). The responsible German body involved in its preparation was the Normenausschuss Beschichtungsstoffe und Beschichtungen (Coatings and Coating Materials Standards Committee), Working Committee NA 002-00-07 AA Allgemeine Prfverfahren fr Beschichtungsstoffe und Beschichtungen. The DIN Standards corre
7、sponding to the International Standards referred to in this document are as follows: ISO 1513 DIN EN ISO 1513 ISO 1514 DIN EN ISO 1514 ISO 1520 DIN EN ISO 1520 ISO 2409 DIN EN ISO 2409 ISO 2808 DIN EN ISO 2808 ISO 2813 DIN EN ISO 2813 ISO 2815 DIN EN ISO 2815 ISO 3668 DIN EN ISO 3668 ISO 9117-5 DIN
8、EN ISO 9117-5 ISO 15528 DIN EN ISO 15528 Amendments This standard differs from DIN 53221:2005-08 as follows: a) the status of the standard has been changed to that of a European Standard; b) a distinction is made between overcoatability and recoatability; c) the definition of recoatability has been
9、added. Previous editions DIN 53221: 1973-12, 2005-08 DIN EN ISO 16927:2014-06 3 National Annex NA (informative) Bibliography DIN EN ISO 1513, Paints and varnishes Examination and preparation of test samples DIN EN ISO 1514, Paints and varnishes Standard panels for testing DIN EN ISO 1520, Paints and
10、 varnishes Cupping test DIN EN ISO 2409, Paints and varnishes Cross-cut test DIN EN ISO 2808, Paints and varnishes Determination of film thickness DIN EN ISO 2813, Paints and varnishes Determination of gloss reading at 20, 60 and 85 DIN EN ISO 2815, Paints and varnishes Buchholz indentation test DIN
11、 EN ISO 3668, Paints and varnishes Visual comparison of the colour of paints DIN EN ISO 9117-5, Paints and varnishes Drying tests Part 5: Modified Bandow-Wolff test DIN EN ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling DIN EN ISO 16927:2014-06 4 This page is intenti
12、onally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 16927 January 2014 ICS 87.040 English Version Paints and varnishes - Determination of the overcoatability and recoatability of a coating (ISO 16927:2014) Peintures et vernis - valuation des possibilits dapplication dune couche sup
13、plmentaire du mme produit ou dun autre produit de peinture (ISO 16927:2014)Beschichtungsstoffe - Prfung der berarbeitbarkeit und berlackierbarkeit einer Beschichtung (ISO 16927:2014) This European Standard was approved by CEN on 6 December 2013. CEN members are bound to comply with the CEN/CENELEC I
14、nternal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to
15、any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation 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
16、 versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Nor
17、way, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of expl
18、oitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 16927:2014 EContents Page Foreword . 3 Introduction . 4 1 Scope . 5 2 Normative references. 5 3 Terms and definitions 5 4 Sampling . 6 5 Preparation of test coatings 6 6 Preparation of test 6 7 Procedu
19、re and evaluation . 6 7.1 Application of the coating material 6 7.2 Observations during recoating . 6 7.3 Tests after drying/hardening or stoving 6 7.4 Evaluation . 7 8 Test report . 7 Bibliography 8 2DIN EN ISO 16927:2014-06EN ISO 16927:2014 (E) Foreword This document (EN ISO 16927:2014) has been p
20、repared by Technical Committee ISO/TC 35 “Paints and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or
21、by endorsement, at the latest by July 2014, and conflicting national standards shall be withdrawn at the latest by July 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for ide
22、ntifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yug
23、oslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 16927:2014 h
24、as been approved by CEN as EN ISO 16927:2014 without any modification. 3DIN EN ISO 16927:2014-06EN ISO 16927:2014 (E)IntroductionThe terms “overcoatability” and “recoatability” are used differently. Hence, there are numerous different test methods. Aiming for a standardization and facilitation of co
25、mmunication between contractor and customer, in this International Standard a test method has been prepared which determines the procedure for testing the overcoatability and/or recoatability of a coating.“Overcoatability” is applicable to the multi-coat system in manufacture, e.g. applying a top co
26、at to the priming coat.“Recoatability” is applicable to repairing or recoating of already completed constructions, e.g. during or immediately after installation.It was impossible to specify a suitable test method for all indicated cases and to combine them in a International Standard.The limitation
27、to “unaged” coatings should be understood as coatings not yet exposed to corrosion stress or similar stress which might influence the recoatability performance. In the case of arising difficulties concerning the interpretation of the term, e.g. in regard to priming coats as protection for intermedia
28、te storage or transport when it takes some time before another coating material is applied, the contracting parties should especially agree upon the approach.Note that the recoatability performance for certain coating materials might be time-dependent. Furthermore, it is recommended that an intermed
29、iate drying/hardening should be adapted to in-practice conditions, if such a particular intermediate drying/hardening is specified or agreed before recoating.This International Standard leaves various aspects subject to agreement to a much larger extent than common in other standards. However, achie
30、ving a wide-ranging applicability of the procedure only allowed such an approach.4DIN EN ISO 16927:2014-06EN ISO 16927:2014 (E) 1 ScopeThis International Standard specifies a method for testing the overcoatability and recoatability of unaged single-coat or multi-coat systems using a coating material
31、 which is intended for repairing damaged areas during or after installation.Since the testing of overcoatability and recoatability can be conducted under different conditions, this International Standard only specifies one procedure and indicates the basic parameters.The existing single-coat or mult
32、i-coat system is indicated as coating A and the new single-coat or multi-coat system as coating B. The same applies analogously for the respective coating materials.2 Normative referencesThe following documents, in whole or in part, are normatively referenced is this document and are indispensable f
33、or its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including all amendments).applies.ISO 1513, Paints and varnishes Examination and preparation of test samplesISO 1514, Paints and varnishes Standard panels
34、for testingISO 1520, Paints and varnishes Cupping testISO 2409, Paints and varnishes Cross-cut testISO 2808, Paints and varnishes Determination of film thicknessISO 2813, Paints and varnishes Determination of specular gloss of non-metallic paint films at 20, 60 and 85ISO 2815, Paints and varnishes B
35、uchholz indentation testISO 3668, Paints and varnishes Visual comparison of the colour of paintsISO 9117-5, Paints and varnishes Drying tests Part 5: Modified Bandow-Wolff testISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling3 Terms and definitionsFor the purposes of t
36、his document, the following terms and definitions apply.3.1recoatabilityability of a film of a coating material to accept a further coat of the same coating material3.2overcoatabilityability of a film of a coating material to accept a coat of a different coating material5DIN EN ISO 16927:2014-06EN I
37、SO 16927:2014 (E)4 SamplingTake a representative sample of the coating material to be tested as specified in ISO 15528. Examine each sample in accordance with ISO 1513 and prepare for further testing.For testing completed coatings take samples in a manner so they are valid as representative samples.
38、5 Preparation of test coatingsAs the substrate of coating A, use the material for which the coating material is intended.Clean and degrease the substrate in accordance with ISO 1514.Apply and aftertreat, if applicable, coating A as agreed.6 Preparation of testSlightly dry-grind (or down to the subst
39、rate, respectively) 1/3 or 2/3 of the surfaces of air-drying coatings after reaching degree of drying 6 in accordance with ISO 9117-5 and oven-dried coatings after taking from the oven and cooling down to room temperature, using 400 grade abrasive paper. The last third will not be ground.When coatin
40、g A consists of several layers and these layers are included in the testing of recoatability, additional test panels, on which the coating is being ground down to the respective layer, shall be produced.Clean the surfaces with a smooth brush or cloth after grinding.Precisely measure the film thickne
41、ss of coating A before and after grinding in accordance with one of the methods specified in ISO 2808.7 Procedure and evaluation7.1 Application of the coating materialImmediately after cleaning coating A, apply and dry/harden the coating material B as agreed.Precisely measure the film thickness of c
42、oatings A and B after drying in accordance with one of the methods specified in ISO 2808.7.2 Observations during recoatingObserve during recoating and during drying time (see 7.3), if surface defects occur, e.g. swelling, lifting of the film, rippling, wetting defects, colour changes, on the ground
43、or unground surfaces and on the edges of the test panels. Report the time when such defects are first observed.7.3 Tests after drying/hardening or stoving7.3.1 GeneralConduct the tests in accordance with 7.3.2 to 7.3.6 on air-drying coatings after reaching degree of drying 6 in accordance with ISO 9
44、117-5 and on oven-drying coatings after 12 h after taking from the oven at the earliest. In both cases conduct the tests on the ground as well as on the unground surfaces of the test panels. Additional tests, e.g. for blistering and cracking or with particular stress, shall be specifically agreed.6D
45、IN EN ISO 16927:2014-06EN ISO 16927:2014 (E) 7.3.2 Cross-cut testConduct the cross-cut test in accordance with ISO 2409.NOTE 1 For filled surfaces a cross-cut test is inappropriate.NOTE 2 The adhesion between the coatings is often deteriorated when exposed to moisture.7.3.3 Buchholz indentation test
46、Conduct the Buchholz indentation test in accordance with ISO 2815.7.3.4 Cupping testConduct the cupping test in accordance with ISO 1520.NOTE For certain coating systems (e.g. using meagre fillers or thick film fillers) a cupping test is uninformative.7.3.5 GlossMeasure the gloss in accordance with
47、ISO 2813.7.3.6 ColourDetermine any resulting colour change in accordance with ISO 3668, if not otherwise agreed.7.4 EvaluationDetermine the outcome of the test by comparing the results for the test panels with those from panels with only one coating.8 Test reportThe test report shall contain at leas
48、t the following information:a) the type and identification of coating materials A and B;b) a reference to this International Standard (ISO 16927:2014);c) the material (material number, if applicable), surface properties and pre-treatment of the substrate;d) the processing of the coating materials (e
49、.g. spraying), drying/hardening conditions (e.g. 20 min at 140 C or 48 h air-dried at 23 C and 50 % relative humidity) and drying/hardening time until grinding coating A;e) the film thickness of the ground and unground surfaces of coating A and the coatings A and B, in micrometres;f) the results of the test according to 7.2, indicating the period of time until the defects occur, depending on type of defect in seconds, minu
