AGCO SA Corporate Material Specification GIMA Engineering CMS M1075 PRIMER DEPOSITION BY CATHODIC DIP COATING OR AUTOPHORETIC COATING 05 7 DEC 2015 R.PERSEVAL Add ‘5. Manufacturing products’ 04 03 JUN 2013 R.PERSEVAL Add Autophoretic coating as alternative to cathodic dip coating (cataphoresis) 03 26 JAN 2009 E. LAJOYE Layout (AGCO / GIMA) 02 28 FEB 2007 E. LAJOYE Editorial changes, references to ISO standards added, BVS engineering appendix no more required Issue Date Author BEAUVAIS History Page 1 of 6 Issue 05: Dec 2015 E 00887 AGCO SA Corporate Material Specification GIMA Engineering CMS M1075 CONTENTS 1. Introduction ____________________________________________________ 3 1.1 Object _____________________________________________________________________ 3 1.2 Prescription on drawings _____________________________________________________ 3 1.3 Reference documents ________________________________________________________ 3 2. Application ______________________________________________________ 4 3. Specifications ____________________________________________________ 4 3.1 Colour _____________________________________________________________________ 4 3.2 Visual appearance ___________________________________________________________ 4 3.3 Thickness __________________________________________________________________ 4 3.4 Cross-Cut Test ______________________________________________________________ 4 3.5 Pencil hardness _____________________________________________________________ 4 3.6 Flexibility __________________________________________________________________ 5 3.7 Water Resistance ____________________________________________________________ 5 3.8 Gazoline Resistance __________________________________________________________ 5 3.9 Diesel fuel Resistance ________________________________________________________ 5 3.10 Hot Oil Resistance __________________________________________________________ 5 3.11 Humidity Resistance ________________________________________________________ 5 3.12 Salt Spray Test _____________________________________________________________ 6 4. Test panels ______________________________________________________ 6 4.1 Panels _____________________________________________________________________ 6 4.2 Preparation of the panels _____________________________________________________ 6 4.3 Primer coating ______________________________________________________________ 6 4.4 Primer drying ______________________________________________________________ 6 5. Manufacturing products ____________________________________________ 6 BEAUVAIS Page 2 of 6 Issue 05: Dec 2015 E 00887 AGCO SA Corporate Material Specification GIMA Engineering CMS M1075 PRIMER DEPOSITION BY CATHODIC DIP COATING OR AUTOPHORETIC COATING 1. Introduction 1.1 Object This specification determines the minimal qualitative requirements for cathodic dip coating (cataphoresis) or autophoretic coting primers on parts that are not directly exposed to UV from sun or to the weather and when the colour is not important. The use of autophoretic coating (autodepositon) is only allowed by AGCO Beauvais Engineering. For this process, Aquence 866 or 930 series coating products by Henkel shall be used for our applications. 1.2 Prescription on drawings Primers covered by this specification shall be designated as follows: "Primer deposition according to CMS M1075" 1.3 Reference documents CMS M1000: Paint System Performance Specification ISO 2409: Paints and varnishes – Cross-cut test ISO 2812-2: Paints and varnishes – Determination of resistance to liquids – Part 2: Water immersion method ISO 9227: Corrosion tests in artificial atmospheres – Salt spray tests ISO 6860: Paints and varnishes – Bend test (conical mandrel) ASTM D 609: Standard Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related Coating Products. ASTM D 2247: Testing Water Resistance of Coatings in 100% Relative Humidity ASTM D 3359: Standard Test Methods for Measuring Adhesion by Tape Test ASTM D 3363: Standard Test Method for Film Hardness by Pencil Test BEAUVAIS Page 3 of 6 Issue 05: Dec 2015 E 00887 AGCO SA Corporate Material Specification GIMA Engineering CMS M1075 2. Application Primers answering to this specification have to be convenient for the coating of cleaned bare metallic surfaces. Pre-treatment of steel parts before primer coating has to be in accordance with the metal pre-treatment prior to paint described in AGCO specification GD10000101. 3. Specifications Primers answering to this specification and applied to test panels specified in section 4 shall satisfy the following specifications when inspecting them to the naked eye. 3.1 Colour There is no requirement on colour, but it has to be compatible with the top coat. 3.2 Visual appearance Primer shall achieve a smooth and uniform coating without harmful defects, and shall cover integrally the subjacent material. 3.3 Thickness Thickness of dry film has to be comprised between 15 and 30m. 3.4 Cross-Cut Test The primer, when tested using a crosshatch to ISO 2409, shall show no lifting or flaking: classification 0 to 1. Note: Current primers that have been approved using ASTM D3359 are still valuable, but ISO 2409 is the method to be used for new primer validations. 3.5 Pencil hardness The primer applied with on a test panel shall have “H” pencil hardness minimum when tested to ASTM D3363. BEAUVAIS Page 4 of 6 Issue 05: Dec 2015 E 00887 AGCO SA Corporate Material Specification GIMA Engineering CMS M1075 3.6 Flexibility The primer applied to a test panel shall show no cracking or peeling beyond the 6mm diameter mark immediately after bending around a 3.1mm conical mandrel as according to ISO 6860, with the following parameters: - temperature: 20 ± 1 °C - relative humidity: 65 ± 5 % - bending period: 15 to 30 seconds 3.7 Water Resistance The primer applied on a test panel shall show no wrinkling / blistering immediately upon removal after being immersed in distilled water held at 37 ± 2 °C for 500 hours in a chamber according to ISO 2812-2. 3.8 Gazoline Resistance The primer applied on a test panel shall show no wrinkling, blistering immediately upon removal from immersion for 24 hours in a mixture of 2/3 automotive gasoline and 1/3 White Spirit held at 20°C. 3.9 Diesel fuel Resistance The primer applied on a test panel shall show no wrinkling or blistering immediately upon removal from a 24 hour immersion in diesel fuel held at a temperature of 20°C. 3.10 Hot Oil Resistance The primer applied on a test panel shall show no wrinkling, blistering immediately upon cooling after removal from immersion for 24 hours in straight oil (SAE 10W40 grade) held at 80°C. 3.11 Humidity Resistance Conduct the test according to ASTM D 2247. The enamel shall show no rusting, blistering, loss of adhesion, chalking or dulling immediately upon removal after an exposure at 100% relative humidity using the following test: BEAUVAIS Page 5 of 6 Issue 05: Dec 2015 E 00887 AGCO SA Corporate Material Specification GIMA Engineering CMS M1075 Cycling temperature in heating from 42°C to 48°C occurs over the first 30 minutes of each test hour and cooling from 48°C to 42°C occurs over the second half of each hour for a 72 hour period. 3.12 Salt Spray Test The primer system (primer applied on a test panel and properly cured) is first scribed by 2 scribes forming a V which penetrate to bare metal with a 200 to 250m width knife; then it is tested to neutral salt spray test according to ISO 9227 or equivalent for 700h. Upon removal from the test chamber the paint system is rinsed with water. After 3 hours air dry an adhesive tape is applied on the scribe and pulled off. Maximal permissible rust creep shall not exceed 1mm from either side of the scribe line. 4. Test panels 4.1 Panels All test panels shall be in low-carbon and polished cold rolled sheet steel, of 1 mm thickness (Type 2 according to ASTM D609, or equivalent), and of a convenient dimension for the test. Surfaces of test panels have to be free from rust or traces of oxidation. 4.2 Preparation of the panels Before the application of the primer test panels must be carefully cleaned according to the method D of ASTM D609 (or equivalent). 4.3 Primer coating The primer shall be coated in order to have a film similar to that obtained with the plant production process. Thickness of dried film shall be comprised between 15 to 30m. 4.4 Primer drying Primer applied on test panels shall be properly cured before being tested according to the test methods of this document. 5. Manufacturing products In case of blinded, drilled or threaded holes with a diameter ≤ 10mm, suppliers have to mask them before coating to avoid assembly problems! BEAUVAIS Page 6 of 6 Issue 05: Dec 2015 E 00887
