1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 08 19 Revised Para 3.0 inserted; Para 3.1, 3.2, 3.3, 3.8, 4 deleted 1998 03 24 Activated N. Chamberlain G. Schuh Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 1 of 5 PERFORMANCE, PRIMER COATING, WATER
2、BORNE WSS-M2P182-A CATHODIC ELECTROCOAT 1. SCOPE This specification defines the performance of electrocoat paint finishes for best appearance and highest durability on automotive parts. 2. APPLICATION This specification was released originally to define paint performance for cathodic electrocoated p
3、aint, cathodic electrocoated vehicle bodies and exterior metal parts. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 PREPARATION OF TEST PANELS
4、Coating System I - Electrocoat Only Coating System II - Electrocoat and Primer Surfacer Coating System III - Total Paint System 3.4.1 Substrates Auto body steel, aluminum, pre-coated or electroplated zinc or zinc alloy coated steel and zinc die casting or as specified on Engineering documents. 3.4.2
5、 Substrate Condition The surface to be coated must be cleaned by an automated process to ensure the absence of oil or alkaline residues, fingerprints, corrosion, dirt, moisture, and other foreign materials. 3.4.3 Coating Material 3.4.3.1 Zinc Phosphate (All Panels) Zinc phosphate coating per WSS-M3P
6、1-D for cold rolled steel, pre-coated, electroplated zinc or zinc alloy coated steel and zinc die castings. Aluminum when processed alone should use chromium oxide coating per WSK-M6P2-B. If steel and aluminum parts are processed concurrently, apply zinc phosphate per WSS-M3P1-D. Do not exceed the a
7、luminum tolerance of the process. Steel and aluminum parts are to meet all requirements of both WSS-M3P1-D and this specification. ENGINEERING MATERIAL SPECIFICATIONWSS-M2P182-APrinted copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 2 of 5 3.4.3.2 Cathodic Electrocoat (Co
8、ating System I) Ford Engineering approved current production materials or material under evaluation. Film thickness requirements are based on current product requirements or direction of materials engineer. Baking requirements at 10 minutes at 165, 175 and 200 C metal temperature. 3.4.3.3 Electrocoa
9、t and Primer Surfacer (Coating System II) Ford Engineering approved current production materials. 3.4.3.4 Total Paint System (Coating System III) Ford Engineering approved current production materials. 3.4.4 Finished Parts (As required) Testing must be conducted on actual production parts. Where par
10、t dimensions limit equipment access, representative panels run through the production processes may be substituted for production parts. These panels shall be processed together with parts and shall be representative of the parts with respect to substrate, phosphate coating, primer thickness, sandin
11、g, enamel thickness, and processing. 3.5 RESISTANCE PROPERTIES 3.5.1 Adhesion, max Coating System I - Grade 0 (FLTM BI 106-01, Coating System II Coating System I and III; not for Precoated Steel) Perform test on iron and steel substrates only. Scribe panels after painting with two diagonal lines fro
12、m corner to corner diagonally. Scribe to the bare metal. Failure is blisters, rust or loss of adhesion exceeding 3 mm from scribe line. ENGINEERING MATERIAL SPECIFICATIONWSS-M2P182-APrinted copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 3 of 5 3.5.5 Florida Exposure 3 Mo
13、nths (SAE J1976, Procedure A plus twice weekly spray application of 5% saline salt solution) Scribe panels after painting with two diagonal lines from corner to corner diagonally. Scribe to the bare metal. Failure is blisters, rust or loss of adhesion exceeding 3 mm from scribe line. 3.5.6 Resistanc
14、e to Scab Corrosion, max 50 cycles (FLTM BI 123-01) 1) Prepare bimetallic split coach joint panels according to Coating System III - Total Paint System. After paint, scribe across the two substrates to the base metal. Failure is blisters, rust or loss of adhesion exceeding 10 mm from scribe line or
15、from the joint of the bimetallic coach joint. 2) Prepare panels of all substrates according to Coating System III - Total Paint System. After paint, scribe panels with two diagonal lines from corner to corner diagonally. Scribe to the bare metal. Failure is blisters, rust or loss of adhesion exceedi
16、ng 3 mm from the scribe line. 3.5.7 Film Yellowing, max delta B of 3 (FLTM BV 153-12, Procedure B) Perform this test with a white basecoat/clearcoat system and a white or light gray colored primer system. 3.5.8 Fume Yellowing, max delta B of 3 (FLTM BI 120-16) Perform this test with a white basecoat
17、/clearcoat system and a white or light gray colored primer system. 3.5.9 Resistance to Edge Corrosion, max 40 Rust Spots (For High Edge Electrocoat Materials only) (FLTM BI 127-01, 168 h) 3.6 THROWING POWER 3.6.1 Preparation of Throw Power Panels (FLTM BI 120-02) Throw power panels shall be prepared
18、 as per above test method with the following exceptions: The substrates used shall be standard steel panels for the salt spray test and zinc coated panels for the scab corrosion test. Do not scribe any of the panels. Prepare phosphated panels per WSB-M3P1-D prior to painting. Prepare clean panels by
19、 cleaning the steel surface with a lint-free cloth soaked with solvent and then rinse steel surface with the same solvent. Allow to dry at room temperature (23 +/- 2 C). Prepare the oiled substrates per FLTM BZ 150-11 without baking the oil on the panel or by the following method: ENGINEERING MATERI
20、AL SPECIFICATIONWSS-M2P182-APrinted copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 4 of 5 1) Clean the steel surface with a lint-free cloth soaked with solvent and then rinse steel surface with the same solvent. 2) Allow to dry at room temperature (23 +/- 2 C). 3) Immedi
21、ately after air drying, apply oil using a #6 draw down bar, squeegee applicator or other suitable devices to deposit a wet film approximately 0.014 mm thick. The voltage used to prepare throw power panels shall be the same voltage required to obtain a 20 micrometer electrocoat paint film thickness o
22、n a standard phosphated test panel prepared per FLTM BI 120-01. Bake the electrocoat primed panels 10 minutes at 175 C metal temperature. 3.6.2 Throw Power Requirements Standard Panels are to be tested in Salt Spray per FLTM BI 103-01. The zinc coated panels are to be tested in the Scab Corrosion Te
23、st per FLTM BI 123-01. mm of mm of Substrate/Surface Test Protection Protection Condition Duration Before After Testing Testing For Conventional Throw-power Electrocoat: Standard Phosphate Panel 240 h 200 180 Standard Clean Panels 240 h 170 130 Standard Oiled Panels 120 h 120 60 Zinc-coated Phosphat
24、e Panels 50 C 200 150 Zinc-coated Oiled Panels 50 C 160 130 For High Throw-power Electrocoat: Standard Phosphate Panel 240 h 210 200 Standard Clean Panels 240 h 180 140 Standard Oiled Panels 120 h 160 100 Zinc-coated Phosphate Panels 50 C 210 170 Zinc-coated Oiled Panels 50 C 170 140 3.7 MATERIAL CO
25、MPATIBILITY The material must be compatible with all related materials, for example, electrocoats, sealers, and adhesives. The supplier of this material shall keep abreast of changes in technology of related materials which may affect the compatibility and performance of this product. The supplier s
26、hall notify the appropriate Ford Product Materials Engineering Office in writing when incompatibility is anticipated. ENGINEERING MATERIAL SPECIFICATIONWSS-M2P182-APrinted copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 5 of 5 5. GENERAL INFORMATION The information given
27、below is provided for clarification and assistance in meeting the requirements of this specification. The corrosion resistance required in this specification is the basis of corrosion protection of vehicle body steel. Test Panels and parts which meet this specification will also conform with the cor
28、rosion requirements of WSS-M2P180-A. 5.1 PANEL INFORMATION 5.1.1 Standard Steel Panels Standard steel panels are laboratory quality mild coal rolled steel available clean or zinc phosphated. Qualified coil stock is available from Advanced Coating Technologies, Inc.* OR Use panels prepared in accorda
29、nce with Ford Manufacturing Standard U-MA001-8001. 5.1.2 Electrogalvanized Steel 50 - 80 g/m2Qualified coil stock is available from Advanced Coating Technologies, Inc.* OR Use panels complying with relevant grades of WSB-M1A250-C3 and WSB-M1A311-B2. 5.1.3 Aluminum Panels Aluminum panels (AA6111) can be obtained from Advanced Coating Technologies, Inc.* 5.2 PANEL PREPARATION Panels can be prepared and or tested at: *Advanced Coating Technologies, Inc. P.O. Box 735 273 Industrial Dr. Hillsdale, Michigan 49242 (517) 439-1485
