1、I INTERNATIONAL TRUCK and ENGINE CORPORATION I CEMS (CORPORATE ENGINEERING MATERIAL SPECIFICATION) TITLE: Plastic Coatings - Powder System Materials Engineering Materials Engineering WHTTENREVIE WED BY: PPROVED Bi? NUMBER: CEMS G-15 CURRENT ISSUE DATE: April 2002 July 1999 SUPERSEDES ISSUE OF: 1.0 S
2、COPE This specification covers the Corporations requirements for plastic coatings applied by a fluidized bed coating technique to provide improved bearing properties, corrosion resistance and other properties. 2.0 INTRODUCTION The powder coat system provides another means to provide a smooth, nonpor
3、ous coating on either simple or complex parts. Relatively heavy coatings providing a comfortable “feel” on handles and knobs can be provided. 3.0 CONTENTS REFERENCE DOCUMENTS CLASSIFICATION AND REQUIREMENTS QUALITY METHODS OF TEST SOURCE APPROVAL AND QUALITY CONTROL DESIGNATION ON DRAWINGS PACKING A
4、ND SHIPPING APPENDIX - General Information (Not a Requirement) PAGE 1 1 2 3 3 3 3 Green Sheets 4.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following standards, specifications and regulations are referenced in this specification. Q
5、uality System Standard QS-9000 (IS0 9001) INTERNATIONAL IQR Quality Standard INTERNATIONAL Manufacturing Standard D-13 CFR Title 29, Part 1910 5.0 CLASSIFICATION Coatings are classified by material, thickness, and adhesion. This document is restricted and may not be sent outside International Truck
6、and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 02002 International Truck and Engine Corporation. APRIL 2002 Page i of 3 NUMBER: CEMS G-15 5.1 Obsolete Classes/Compositions Specially prepared materials
7、 previously designated as IH No. 1 that is, they must be free from materials such as grease, oil, loose rust or scale. The preferred cleaning method is to use an alkaline cleaner in a pressure type spray washer. This document is restricted and may not be sent outside International Truck and Engine C
8、orporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 02002 International Truck and Engine Corporation. NUMBER: TITLE: CURRENT ISSUE DATE: CEMS-G-15, APPX Plastic Coatings - Powder System April 2002 A.4 BASIC MATERIALS
9、This coating process is applicable to any base material or substrate which has a melting point substantially higher than that of the coating material and will not form a nonadherent oxide film at coating temperatures. These requirements permit coating most ferrous metals (such as iron, steel, cast i
10、ron, etc.), aluminum and glass; but prohibit coating metal alloys containing low melting constituents such as uncombined tin, copper or lead. A.5 TYPICAL APPLICATIONS Plastic coatings have been successfully applied in the following areas: A.5.1 Bearing Surfaces - The toughness and low coefficient of
11、 friction of nylon and teflon which encouraged their use as bearings are retained with the additional advantage of creating a bearing surface wherever needed as on pivots and ball joints, rocker arm shafts, transmission shift forks and rails. A.5.2 Parts Subject To Corrosion - These heavy, durable,
12、corrosion - resistant coatings are applicable to chemical handling equipment or parts subject to heavy corrosion damage. A.5.3 Handles And Decorative Parts - The ability to produce a smooth and level coating on rough surfaces such as sand castings and forgings, recommends this process. A.6 PLASTIC C
13、OATING MATERIALS Several plastic materials are currently available in finely divided powder suitable for coating by the fluidized bed process. The properties of these coatings are summarized in the following table. Considerable variation is encountered in coating materials of the same basic type but
14、 supplied by different manufacturers. For this reason, the prescribed qualification procedure must be closely followed. This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers ar
15、e required to assume all patent liability. 02002 International Truck and Engine Corporation. NUMBER: TITLE: CURRENT ISSUE DATE: CEMS-G-15, APPX Plastic Coatings - Powder System April 2002 PROPERTIES OF POWDER SYSTEM PLASTIC COATINGS : Coating M: olye thylene fair erials Epoxy good good excellent Pla
16、sc Polye ther fair excellent excellent Property Nylon Teflon excellent excellent excellent eather Resistance fair hemical Resistance uel and Oil Resistance excellent excellent excellent fair natural natural dark colors, natural Color Range wide medium dark colors high wide wide medium to high poss m
17、edium I low medium medium hard, tough hard, glass-like medium hard, horn-like hard, horn-like Surface Characteristics soft, waxy SOR, waxy oating Thickness, mils lnge ,020-.O38 10-15 0.25-0.38 very high (500) 8-15 0.20-0.38 high (200) 5-30 0.13-0.76 very low (30) 8-20 0.20-0.51 medium to low (80) me
18、dium 0.20-0.51 0.20-0.51 high medium aterial Cost medium oeffcient of Friction I low very low medium to low very low I medium low Abrasion or Wear Resistance very high very high 500 medium 180-300 80-150 high medium decorative a? Operating1 1 em erature decorative 250 175 260 120 80 parts, handles,
19、abrasion resistant parts decorative iarts, handles, abrasion resistant parts corrosion resistant and nonsticking parts corrosion resistant and electrical parts high temperature bearings corrosion resistant parts parts, handles, bearings. * Suggested Uses AA, AB, AC, BA, BB, BC AA, AB, AC, BA, BB, BC
20、 AA, AB, BB, BC ecommended Classes * AC, BA, BB BC AA. AB * To provide the high adhesion required for optimum bearing properties with nylon, a primer is required. The recommended classes shown are intended to be a guide to current common practice. However, this does not imply that other classes are
21、necessarily impossible or impractical. * This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 02002 International Truck and Engine Corporation.
