1、June 2014Translation by DIN-Sprachendienst.English price group 12No 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(“2156405www.din.deDDIN EN ISO 16925SupersedesDIN 55662:2009-12www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 22 pages05.14Paints and varnishes Determination of the resistance of coatings to pressure water-jetting(ISO 16925:201
3、4);English version EN ISO 16925:2014,English translation of DIN EN ISO 16925:2014-06Beschichtungsstoffe Prfung der Bestndigkeit von Beschichtungen gegen Druckwasserstrahl(ISO 16925:2014);Englische Fassung EN ISO 16925:2014,Englische bersetzung von DIN EN ISO 16925:2014-06Peintures et vernis Dtermina
4、tion de la rsistance des revtements un jet deau sous pression(ISO 16925:2014);Version anglaise EN ISO 16925:2014,Traduction anglaise de DIN EN ISO 16925:2014-06DIN EN ISO 16925:2014-06 2 A comma is used as the decimal marker. National foreword This document (EN ISO 16925:2014) has been prepared by T
5、echnical 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). The responsible German body involved in i
6、ts preparation was the Normenausschuss Beschich-tungsstoffe und Beschichtungen (Coatings and Coating Materials Standards Committee), Working Committee NA 002-00-07 AA Allgemeine Prfverfahren fr Beschichtungsstoffe und Beschichtungen. The determination of the resistance of coatings to pressure water-
7、jetting (Prfung der Bestndigkeit von Beschichtungen gegen Druckwasserstrahl) is also expressed in German as Dampfstrahltest. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 1513 DIN EN ISO 1513 ISO 2808 DIN EN ISO 2808 ISO 4618 DIN EN I
8、SO 4618 ISO 15528 DIN EN ISO 15528 ISO 16276-1 DIN EN ISO 16276-1 ISO 17872 DIN EN ISO 17872 Amendments This standard differs from DIN EN 55662:2009-12 as follows: a) the status of the standard has been changed to that of a European Standard; b) no further modifications have been made. Previous edit
9、ions DIN 55662: 2009-12 National Annex NA (informative) Bibliography DIN EN ISO 1513, Paints and varnishes Examination and preparation of test samples DIN EN ISO 2808, Paints and varnishes Determination of film thickness DIN EN ISO 4618, Paints and varnishes Terms and definitions DIN EN ISO 15528, P
10、aints, varnishes and raw materials for paints and varnishes Sampling DIN EN ISO 16276-1, Corrosion protection of steel structures by protective paint systems Assessment of, and acceptance criteria for the adhesion/cohesion (fracture strength) of a coating Part 1: Pull-off testing DIN EN ISO 17872, P
11、aints and varnishes Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO16925February 2014 ICS 87.040 English Version Paints and varnishes - Determination of the resistance of coatings to pr
12、essure water-jetting (ISO 16925:2014) Peintures et vernis - Dtermination de la rsistance des revtements un jet deau sous pression (ISO 16925:2014)Beschichtungsstoffe - Prfung der Bestndigkeit vonBeschichtungen gegen Druckwasserstrahl(ISO 16925:2014) This European Standard was approved by CEN on 20 D
13、ecember 2013. 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. Up-to-date lists and bibliographical references concerning such national standards may be
14、 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 translation under the responsibility of a CEN member into its own language and notified to t
15、he 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, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ir
16、eland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Cent
17、re: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 16925:2014 E2DIN EN ISO 16925:2014-06EN ISO 16925:2014 (E)Contents Page Foreword . 3 1 Scope . 4 2 Normative references. 4 3 Terms and d
18、efinitions 4 4 Principle 5 5 Apparatus and materials . 5 6 Sampling . 6 7 Preparation of test specimens 7 7.1 Test specimens 7 7.2 Preparation and coating 7 7.3 Thickness of coating 7 8 Procedure 7 8.1 Introducing the cut or the scribe 7 8.2 Testing . 8 9 Evaluation . 9 9.1 General 9 9.2 Evaluation
19、with pictures to compare . 9 10 Precision . 9 10.1 General 9 10.2 Repeatability limit (r) . 10 10.3 Reproducibility limit (R) . 10 11 Designation . 10 12 Test report . 10 Annex A (normative) Calibration of the test apparatus . 17 Bibliography 20 Foreword This document (EN ISO 16925:2014) has been pr
20、epared 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 b
21、y endorsement, at the latest by August 2014, and conflicting national standards shall be withdrawn at the latest by August 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
22、identifying 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
23、Yugoslav 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 16925:201
24、4 has been approved by CEN as EN ISO 16925:2014 without any modification. 3DIN EN ISO 16925:2014-06EN ISO 16925:2014 (E)1 ScopeThis International Standard specifies a test method for the assessment of the resistance of coatings to pressure water-jetting. The test method simulates the effects pressur
25、e water-jetting has on a coating.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenc
26、ed document (including any amendments) applies.ISO 1513, Paints and varnishes Examination and preparation of test samplesISO 2808, Paints and varnishes Determination of film thicknessISO 4618, Paints and varnishes Terms and definitionsISO 15528, Paints, varnishes and raw materials for paints and var
27、nishes SamplingISO 17872, Paints and varnishes Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 4618 and the following apply.3.1fracture strengthfo
28、rce required to exceed the attachment forces between coats or between coat and substrate (adhesion) and/or within a coat (cohesion)SOURCE: ISO 16276-1:2007, 3.13.2adhesionphenomenon of attachment at the interface between a solid surface and another material caused by molecular forcesNote 1 to entry:
29、 Adhesion should not be confused with cohesion.SOURCE: ISO 4618:2006, 2.63.3cohesionforces that bind a film into an integral entityNote 1 to entry: Cohesion should not be confused with adhesion.Note 2 to entry: Breaks in cohesion can occur within the coating as well as the substrate. In case of brea
30、ks within the substrate, it is subsumed under the term material delamination.SOURCE: ISO 4618:2006, 2.54, modified Note 2 to entry has been added.4DIN EN ISO 16925:2014-06EN ISO 16925:2014 (E)4 PrincipleThe resistance of a coated test specimen to the loss of adhesive strength is tested by means of d
31、efined pressure water-jetting.The extent of the damage of the test specimen primarily depends on, besides the adhesive strength, the space between nozzle and test piece, the volumetric flow rate, the test time, the geometry of the nozzle, the impact area, the angle of impact, and the water temperatu
32、re of the jet, as well as the cutting and scribing tool.The evaluation is carried out by means of a visual comparison of pictures, in which characteristic values are related to the peeled-off areas.The parting line (plane) of the peeling shall be indicated in the test report (e.g. substrate/priming
33、coat).5 Apparatus and materialsOrdinary laboratory apparatus, together with the following:5.1 Pressure water-jet, consisting of a high-pressure pump and a nozzle.A high-pressure pump conveys the water from a storage bin. To avoid influences from variations in pressure, it is necessary that the press
34、ure and the volumetric flow rate be adjustable at the nozzle described below.The water temperature shall be adjustable to 2 C.The temperature shall be adjusted in accordance with Annex A. Necessary safety devices on the pressure side of the unit, as e.g. pressure relief valve and by-pass valve, shal
35、l exist. If the jetting is unsteady, a flow calming section may be installed in front of the nozzle. A pulsation of the water jet at the opening of the pump is inadmissible. In order to reach a reproducible result, the nozzle shall be solidly mechanically fixed and the test specimen shall be secured
36、 against slipping. For the adjustment of the volumetric flow rate, a nozzle with a jet angle of 25 and a volumetric flow rate of 6 l/min at 2 MPa (20 bar) is required (see Annex A).The following technical data should be attainable: volumetric flow rate: 8 l/min to 14 l/min pressure: 4 MPa (40 bar) t
37、o 13 MPa (130 bar) temperature: 20 C to 80 C jetting time: 10 s to 300 sFigure 1 shows the schematic construction of a pressure water-jet apparatus which is specially built for these tests.5DIN EN ISO 16925:2014-06EN ISO 16925:2014 (E)Key1 flow calming section 8 heating2 high-pressure valve, height
38、adjustable 9 base frame, moveable3 test specimen 10 temperature sensor4 clamping element 11 high-pressure pump5 feed tank 12 by-pass valve6 floating valve with filter 13 pressure relief valve7 water shortage safeguard 14 pressure transmitterFigure 1 Schematic construction of a pressure water-jet app
39、aratus5.2 Cutting or scribing tool, to be agreed by the interested parties.The following cutting and scribing tools are appropriate: cutter knife (“C”), scribing tool according to van Laar (“L”) or scribing tool according to Sikkens (“S”), in accordance with ISO 17872.The tool should be safely usabl
40、e.5.3 Time measuring device (stopwatch).6 SamplingTake a representative sample of the product being tested in accordance with ISO 15528.Examine and prepare each sample for testing in accordance with ISO 1513.6DIN EN ISO 16925:2014-06EN ISO 16925:2014 (E)7 Preparation of test specimens7.1 Test specim
41、ensThe test specimens should preferably be plane. The size of the test specimens as well as the number of tests shall be agreed by the interested parties.Test specimens (building components) can have different adhesive strengths. It is recommended that different parts of the test specimen (building
42、components) be tested.7.2 Preparation and coatingThe conditions of coating, drying/hardening, as well as stoving, shall be agreed.Before testing, the coated test specimens shall be conditioned either 48 h at 60 C or 7 days at room temperature. In case of conditioning at 60 C, the specimen shall be c
43、ooled down to room temperature before the cut or scribe (see 8.1) is introduced.7.3 Thickness of coatingDetermine the dry film thickness of the coating, in micrometres, in accordance with one of the procedures specified in ISO 2808.8 Procedure8.1 Introducing the cut or the scribeMake sure that the t
44、est specimen is securely fastened when introducing the cut or the scribe.Introduce both of the cuts or scribes vertically through the coating into the substrate using the cutting or scribing tool, as shown in Figure 2. The depth of the cut or scribe into the substrate should be as minimal as possibl
45、e. The length of the first cut or scribe shall be at least 100 mm, if the geometry of the part allows that. At an angle, introduce a second cut or scribe with a minimum length of 20 mm. The cuts or scribes shall be introduced straight-line at an angle of approximately 30. An automatic cutting or scr
46、ibing device may be used. Residues of the coating shall be removed from the cut or scribe.NOTE The depth of the cut or scribe into the substrate influences the result.The cutting or scribing tools should be checked regularly and replaced if necessary.7DIN EN ISO 16925:2014-06EN ISO 16925:2014 (E)Dim
47、ensions in millimetresFigure 2 Introducing the cuts or scribes (St Andrews cross)8.2 TestingAfter inserting the test specimen into the apparatus (e.g. using a spacer block), calibrate the space between test specimen and nozzle.Operate the pressure water-jetting apparatus at room temperature.Three te
48、st methods (A, B, or C see Table 1) are preferred as well as three possible scribing tools (C, L, or S see 5.3 ). The test method to be applied, the scribing or cutting tool to be used, and the water pressure shall be agreed.Table 1 Test methodsTest methodWater temperatureImpact angleSpace between n
49、ozzle and sampleFlow rateDuration of jettingC mm l/min sA 60 2 90 2 100 1 11,3 0,2 30 1B 60 2 90 2 100 1 11,3 0,2 60 1C 60 2 90 2 130 1 11,3 0,2 60 1For jetting, deionized water should be used.When using automatic and manual devices, fasten the test specimen so that the water jet impacts as shown in Figure 3. The jet impacts in the middle above the point of intersection onto the longer one of both cuts/scribes.N1) National footnote: It should be corrected to read:
