BS-EN-ISO-22775-2004.pdf

BRITISH STANDARD BS EN ISO 22775:2004 Footwear Test methods for accessories: Metallic accessories Corrosion resistance The European Standard EN ISO 22775:2004 has the status of a British Standard ICS 61.060 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:36:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 22775:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 20 December 2004 © BSI 20 December 2004 ISBN 0 580 45122 4 National foreword This British Standard is the official English language version of EN ISO 22775:2004. It is identical with ISO 22775:2004. The UK participation in its preparation was entrusted to Technical Committee TCI/69, Footwear and leather, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, pages 2 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:36:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO 22775 December 2004 ICS 61.060 English version Footwear - Test methods for accessories: Metallic accessories - Corrosion resistance (ISO 22775:2004) Chaussures - Méthodes d'essai pour accessoires: accessoires métalliques - Résistance à la corrosion (ISO 22775:2004) Schuhe - Prüfverfahren für Zubehör: Zubehör aus Metall - Korrosionsbeständigkeit (ISO 22775:2004) This European Standard was approved by CEN on 23 August 2004. 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 obtained on application to the Central Secretariat 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 the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2004 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 22775:2004: E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:36:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 22775:2004 (E) 2 Contents Page Foreword3 1 Scope 4 2 Terms and definitions .4 3 Principle4 4 Apparatus, materials and reagents4 5 Test specimens5 6 Conditioning.5 7 Procedure .5 7.1 Method 1.5 7.2 Method 2.6 8 Calculation and expression of results.6 8.1 Method 1.6 8.2 Method 2.7 9 Test report7 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:36:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 22775:2004 (E) 3 Foreword This document (EN ISO 22775:2004) has been prepared by Technical Committee CEN/TC 309 “Footwear“, the secretariat of which is held by AENOR, in collaboration with Technical Committee ISO/TC 216 “Footwear“. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:36:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 22775:2004 (E) 4 1 Scope This document specifies two methods for determining the propensity of a metal surface to either change visually due to contamination by atmospheric pollution (Method 1: sulphide tarnishing), or to corrode due to the action of salt water (Method 2: salt water corrosion). 2 Terms and definitions For the purposes of this document, the following term and definition applies. corrosion resistance propensity of a metal surface either not to change visually due to chemical attack by atmospheric pollution, or not to be altered due to the action of salt water 3 Principle 3.1 Method 1 A test specimen is stored in a moist atmosphere containing a low concentration of hydrogen sulphide gas for 1 h. The specimen is then assessed subjectively for signs of discoloration. 3.2 Method 2 Cotton lawn, saturated with sodium chloride solution, is wrapped around a test specimen. This assembly is then stored in a sealed bag for 24 h at room temperature. The test specimen is then subjectively assessed for signs of corrosion and the lawn assessed for staining. 4 Apparatus, materials and reagents 4.1 Method 1 4.1.1 Kipps generator or other hydrogen sulphide source. WARNING This equipment should be used only by qualified personnel owing to the extremely toxicity of hydrogen sulphide. 4.1.2 Fume cupboard 4.1.3 Glass vessel which can be sealed and is of sufficient dimensions to contain the test specimen. 4.1.4 Glass tube with volume approximately equal to one thousandth of the volume of the glass vessel (4.1.3). 4.1.5 Means of suspending the test specimen in the glass vessel (4.1.3) so that the gas can circulate freely around it. NOTE Sewing thread is suitable for small test specimens; larger specimens may require plastic supports underneath. 4.2 Method 2 4.2.1 Sealable polyethylene (PE) bags of sufficient dimensions to contain the cotton lawn (4.2.2) and test specimen. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:36:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 22775:2004 (E) 5 4.2.2 Desized and bleached cotton lawn without finish, with an area approximately five times that of the surface area of the test specimen. NOTE Cotton lawn is a fine plain-woven fabric, made in various fine sheer qualities. 4.2.3 Sodium chloride solution of density 30 g/dm3, sufficient quantity to fully saturate the cotton lawn (4.2.2). 5 Test specimens 5.1 Methods 1 and 2 each require two test specimens, one to be exposed to the reagents and one to be used as a reference for visually comparing any damage or discolouration of the exposed specimen. If both methods are to be carried out, then the same reference specimen can be used in both cases. If only one test component is available for each test then cut the specimen into two pieces (see NOTE). The piece containing the portion considered to be least resistant to corrosion or tarnishing should be exposed to the reagents. If cutting is impracticable record details of flaws, marks and general appearance of the test specimen prior to exposure. NOTE It is permissible to conduct this test on a part of a component provided that the part tested contains the portion of the complete component that is considered to be least resistant to corrosion or tarnishing. This may be necessary for a number of reasons such as: Method 1: the complete component is too large to fit into the vessel (4.1.3); Method 2: the complete component is too large to fit into the bag (4.2.1). 5.2 Cut a piece of suitable dimensions from the test specimen. This piece should contain the portion considered to be least resistant to either corrosion or tarnishing. 5.3 Seal any cut edges on the portion of the component to be exposed to the reagents with epoxy resin and allow the resin to harden for at least 24 h before proceeding with the test. 6 Conditioning The test specimens do not need to be conditioned before testing, nor does the test need to be carried out in a standard atmosphere. 7 Procedure 7.1 Method 1 7.1.1 Fill the glass tube (4.1.4) with water and pour this into the bottom of the vessel (4.1.3). 7.1.2 Seal the vessel and leave it for a minimum of 1 h to enable the humidity inside the vessel to increase and stabilise. 7.1.3 Open the vessel and put one of the test specimens inside, using the sewing thread or plastic supports (4.1.5) to suspend or support the specimen so that it is not in contact with the base of the vessel or the water. 7.1.4 Dry the glass tube fill it with hydrogen sulphide gas (4.1.1) and seal it. WARNING Hydrogen sulphide gas is very toxic and has an unpleasant smell. Extreme care should be taken not to inhale any of the gas and this test must be conducted in a fume cupboard. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:36:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 22775:2004 (E) 6 7.1.5 Simultaneously remove the seal from the filled glass tube and place the tube in the vessel. Immediately reseal the vessel. 7.1.6 After 60 min ± 5 min remove the test specimen from the vessel. 7.1.7 Place the two test specimens, one which has been exposed to hydrogen sulphide gas and one which has not, alongside each other in bright indirect lighting conditions. 7.1.8 Visually compare the two test specimens from a range of viewing angles and grade the difference according to the scale specified in 8.1. NOTE 1 The difference between a treated and an untreated test specimen is visually assessed. NOTE 2 Assessment of the relevance of any damage or discolouration to the test specimen in this test is a very subjective process. It is therefore important to know as much as possible about the proposed application of the material and to include a full description of damage incurred by the test specimen in the final report. It is highly recommended that the assessment be carried out by several persons, ideally at least three persons. NOTE 3 Nickel plated articles may perform relatively poorly in this test. Severe discolouration should be ignored provided that it is uniform. 7.2 Method 2 7.2.1 Saturate the cotton lawn (4.2.2) with the sodium chloride solution (4.2.3) at room temperature. 7.2.2 Loosely wrap one of the test specimens in the wet cotton lawn ensuring that the contact area between the lawn and specimen is maximised. 7.2.3 Place the test specimen and cotton lawn assembly into the bag (4.2.1). Seal the bag without expelling the air from inside so that it is partially inflated. 7.2.4 Store the bag and assembly for 24 h ± 1 h at room temperature. Then remove the assembly from the bag and take the test specimen out of the cotton lawn. 7.2.5 Fully rinse the test specimen and the cotton lawn in running tap water and allow them both to dry. 7.2.6 Place the cotton lawn and the two test specimens, one which has been exposed to salt water and one which has not, alongside each other in bright indirect lighting conditions. 7.2.7 Visually compare (see NOTE in 7.1.8) the two test specimens from a range of viewing angles and grade the difference according to the scale specified in 8.2. Record also any staining of the cotton lawn. It is highly recommended that the assessment be carried out by several persons, ideally at least three persons. 8 Calculation and expression of results 8.1 Method 1 The following scale shall be used to grade the difference between the test specimen exposed to hydrogen sulphide gas and the non exposed one: 5 No change 4 Slight uniform change 3 Slight patchy change 2 Marked change Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:36:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 22775:2004 (E) 7 1 Very marked change 8.2 Method 2 The following scale shall be used to grade the difference between the test specimen exposed to salt water and the non exposed one: 5 No change 4 Slight uniform change 3 Slight patchy change or slight rusting 2 Marked change or noticeable rusting 1 Very marked change, discolouration or rusting 9 Test report The test report shall include the following information: a) reference to this document, EN ISO 22775; b) test method (Method 1: sulphide tarnishing or Method 2: salt water corrosion) used; c) full description of the test specimen and its composition, including commercial codes, colours, nature, etc.; d) amount of discolouration or corrosion as grade in 8.1 or 8.2 and number of people who carried out the assessment; e) for Method 2, any staining of the cotton lawn; f) any deviation from this test method and any incident which could affect the result; g) date of testing. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:36:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 22775:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400. BSI offers members