1、 SURFACE VEHICLE RECOMMENDED PRACTICE J2633 MAR2015 Issued 2007-08 Reaffirmed 2015-03 Superseding J2633 AUG2007 Wheel and Wheel Trim Weathering Testing for Paint Coatings RATIONALE J2633 has been reaffirmed to comply with the SAE five-year review policy. FOREWORD These weathering test procedures hav
2、e been agreed to as the preferred methods of evaluating paint systems used for automotive wheels and wheel trim. The intent is to recognize, by the industry, a single common method for each test. These common tests will benefit all by reducing the testing complexity, eliminate the need for specializ
3、ed test equipment and facilities, utilize improved methods, increase test efficiency, and reduce the overall number of special tests required to approve a paint or paint system. 1. SCOPE This SAE lab test procedure should be used when performing the following specialized weathering tests for wheels;
4、 Florida Exposure, QUV, Xenon and Carbon Weatherometer. In addition to these procedures, some additional post-weathering tests may be specified. Please refer to customer specifications for these requirements. 2. REFERENCES 2.1 Applicable Publications The following publications form a part of this sp
5、ecification to the extent specified herein. Unless otherwise indicated, the latest version of SAE publications shall apply. 2.1.1 SAE Publication Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.or
6、g. SAE J1960 Accelerated Exposure of Automotive Exterior Materials Using a Controlled Irradiance Water-Cooled Xenon Arc Apparatus _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is
7、 entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or can
8、celled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, wit
9、hout the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, pl
10、ease visit http:/www.sae.org/technical/standards/J2633_201503 SAE INTERNATIONAL J2633 Reaffirmed MAR2015 Page 2 of 4 2.1.2 ASTM Publications Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D523-89 Standard Test Method for Specular G
11、loss ASTM G154-06 Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials 2.2 Related Publications The following publications are provided for information purposes and are not a required part of this document. 2.2.1 SAE Publication Available from SAE, 400
12、 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J2634 Sample Preparation for Testing by Scribing 2.2.2 ASTM Publications Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, Tel: 610-83
13、2-9585, www.astm.org. ASTM D660-93(2005) Standard Test Method for Evaluating Degree of Checking of Exterior Paints ASTM D661-93(2005) Standard Test Method for Evaluating Degree of Cracking of Exterior Paints ASTM D662-93(2005) Standard Test Method for Evaluating Degree of Erosion of Exterior Paints
14、ASTM D714-02e1 Standard Test Method for Evaluating Degree of Blistering of Paints ASTM D722-93(2002) Standard Test Method for Grease Resistance of Paper ASTM D1729-96(2003) Standard Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials ASTM D2616-96(
15、2003) Standard Test Method for Evaluation of Visual Color Difference With a Gray Scale ASTM D3274-95(2002) Standard Test Method for Evaluating Degree of Surface Disfigurement of Paint Films by Microbial (Fungal or Algal) Growth or Soil and Dirt Accumulation ASTM D4214-98 Standard Test Methods for Ev
16、aluating the Degree of Chalking of Exterior Paint Films 2.3 ASTM Rating System TABLE 1 - ASTM RATING SCALE Quality Rating Change Excellent 10 As received, no change 9 Very slight change Very Good 8 Slight change Good 6 Moderate changeFair 4 Pronounced change Poor 2 Severe changeVery Poor 0 Complete
17、failure SAE INTERNATIONAL J2633 Reaffirmed MAR2015 Page 3 of 4 3. DEFINITIONS 3.1 Gloss Change Loss of gloss from initial (unexposed area) appearance after water washing of tested area. 3.2 Chalking Degradation of coating causing a dry, powdery condition on the coatings surface. 3.3 Color Change Cha
18、nge in visual appearance from unexposed (initial) to post-test; measured by instrumentation and visual comments. 3.4 Blistering Bubbles formed on the coating after weathering tests are performed. 3.5 Adhesion Loss of intercoat / to substrate adhesion. 3.6 Filiform Corrosion Typically white, “filamen
19、t like” tracks evidencing corrosion phenomena under surface films. 3.7 Corrosion Creepback A measured distance from center of scribe to the point where the loss of adhesion of paint film stops. 3.8 Corrosion, Surface Rust Surface corrosion randomly evident in the field of the paint system on a panel
20、 or wheel/trim section. 4. EQUIPMENT AND TEST MATERIALS 4.1 Carbon Arc Weatherometer 4.2 Xenon Lamp Weatherometer, SAE 1960 4.3 QUV, ASTM G 154 5. TEST PROCEDURES 5.1 Carbon Arc Weatherometer Temperature of cabinet should be 63 C, Cycle: 102 minutes light, 18 minutes water spray. An area of each cou
21、pon shall be masked to prevent UV exposure to an area of the coupon, otherwise known as “initial”. The exposed area of the coupons shall be washed with a cloth and warm water to remove dirt at the end of test. Specular Gloss shall be measured, comparing post-tested areas of the coupon to the initial
22、 area in terms of percentage of gloss retention, use ASTM D 523 procedure. Color Change: Visual, see 2.2 for rating scale and Section 3 for definitions SAE INTERNATIONAL J2633 Reaffirmed MAR2015 Page 4 of 4 5.2 Xenon-Lamp Weatherometer See SAE 1960 for test method. Coupons should be sized to fit the
23、 holding fixtures. An area of each coupon shall be masked to prevent UV exposure of an area of the coupon, otherwise known as “initial”. The exposed area of the coupons shall be washed with a cloth and warm water to remove dirt at the end of test. Specular Gloss should be measured, comparing post-te
24、sted areas of the coupon to the initial area in terms of percentage of gloss retention, using ASTM D 523 procedures. Color Change: Visual, see 2.2 for rating scale and Section 3 for definitions. 5.3 QUV Coupons with the complete paint system should be sized to fit the fixture of the test cabinet. Wh
25、eel sections should be as flat as possible to expose the paint system similarly to the coupons. An area of each coupon shall be masked to prevent UV exposure of an area of the coupon, otherwise known as “initial”. The exposed area of the coupons shall be washed with a cloth and warm water to remove
26、dirt. Specular Gloss should be measured, comparing post-tested areas of the coupon to the initial area in terms of percentage of gloss retention using ASTM D 523 procedures. Color Change: Visual, see 2.2 for rating scale and Section 3 for definitions. 5.4 Florida Weathering, exposure site to be docu
27、mented, Florida Exposure Test Service Company, for example Test coupons/parts with complete paint system. An area of each coupon shall be masked to prevent UV exposure of an area of the coupon, otherwise known as “initial”. Coupons to be mounted on black box. Coupons to be exposed at 5 from horizont
28、al, facing south at an accredited Florida weathering test site. The exposed area of the coupons shall be washed with a cloth and warm water to remove dirt. Specular Gloss should be measured, comparing post-tested areas of the coupon to the initial area in terms of percentage of gloss retention, usin
29、g ASTM D 523 procedures. Color Change: Visual, see 2.2 for ratings and Section 3 for definitions. 6. TEST DURATION Duration of each test shall be determined by each customer specification. However, recommended durations are: Carbon-Arc: 500 hours Xenon Lamp: 2500 Kilo Joules (approx. 2000 hours), see SAE J1960 QUV: 1000 hours, see ASTM G 154 Florida Weathering: 1 year PREPARED BY THE SAE WHEEL FINISHING LAB TESTING TASK FORCE OF THE SAE WHEEL STANDARDS COMMITTEE REAFFIMED BY THE WHEEL STANDARDS COMMITTEE
