1、 ENGINEERING STANDARDS Test Procedure LIMITED USE EDS-T-7771 Manufacture of a Defined Oil Film on Steel Surface Do Not Use on New Program; No Replacement. Copyright 2011 General Motors Company All Rights Reserved November 2011 Originating Department: GM Korea Engineering Standards Page 1 of 2 Versio
2、n : 3 1 Scope Note: Nothing in this standard supersedes applicable laws and regulations. Note: In the event of conflict between the Korean and English language, the Korean language shall take precedence. 1.1 Purpose. This test specification defines a method for applying and manufacturing oil films o
3、f reproducible thickness on steel surfaces. 1.2 Applicability. The manufacture of a defined oil film is used as pre-treatment of a test piece for further tests such as corrosion resistance, adhesiveness of coatings, etc. 2 References Note: Only the latest approved standards are applicable unless oth
4、erwise specified. 2.1 External Standards/Specifications. DIN 50011 2.2 GM Standards/Specifications. None 2.3 Additional References. None 3 Resources 3.1 Equipment and Reagents. 3.1.1 Test piece in accordance with technical delivery conditions for materials or other specifications. 3.1.2 ASTM-oil No.
5、 1. 3.1.3 Oil in accordance with the specification as for 3.1.1. 3.1.4 Benzine 100/140 as solvent and thinning agent. 3.1.5 Desiccator to DIN 50011, clause 2.4 (with circulating air). 3.1.6 Bath in the dimensions which guarantee a complete dipping of the test piece. 3.1.7 Cloth without fluff. 4 Proc
6、edures 4.1 Conditions. 4.1.1 Test Conditions. Deviations from the requirements of this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc 4.2 Instructions. 4.2.1 Definition of Oiling Grade. The oiling grade is defined by
7、the oil amount on the test surface of a test piece. The oiling grade list: 4.2.1.1 Light. 1.5 to 2.0 mg oil per 100 cm2 test surface. 4.2.1.2 Medium. 7.5 to 9.5 mg oil per 100 cm2 test surface. 4.2.1.3 Strong. 15.5 to 17.0 mg oil per 100 cm2 test surface. GM KOREA ENGINEERING STANDARDS EDS-T-7771 Co
8、pyright 2011 General Motors Company All Rights Reserved November 2011 Page 2 of 2 Version : 3 4.2.2 Manufacture of the Oil Solution. To achieve the required oiling grade in accordance with clause 4.2.1, an oil solution shall be manufactured from the specified oil to 3.1.2 or 3.1.3 and the benzine to
9、 3.1.4. The concentration of this oil solution, which is required for achievement of the requirement to 4, depends on the kind of the relevant oil(e.g. its viscosity) and the type of the test piece and is specified in the separate specifications. For a oil film with ASTM-oil No. 1 on plates of the d
10、imension (100100) mm, the required film thickness is achieved with the following concentrations. y Light: 3 parts ASTM-oil No. 1 + 97 parts benzene. y Medium: 5 parts ASTM-oil No. 1 + 95 parts benzene. y Strong: 8 parts ASTM-oil No. 1 + 92 parts benzene. 4.2.3 Manufacture of the Oil Film. 4.2.3.1 Th
11、e test piece to be coated shall be cleaned with a cloth to 3.1.7 which is soaked in benzene to 3.1.4, afterwards, washed with the same benzene and dried in the air. 4.2.3.2 Immediately after the drying, the test piece shall be dipped into the appropriate oil solution to 4.2.2 for about one minute an
12、d removed again from it so that the solution drips vertically from the surface to be coated on the shortest way. 4.2.3.3 The test piece shall be dried for about 10 min under the same condition as in 4.2.3.2 in the air and stored again in the same position at +50 E 2.5K in the desiccator 3.1.5 for 16
13、 hours afterwards. 5 Data 6 Safety This standard may involve hazardous materials, operations, and equipment. This standard does not propose to address all the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health pra
14、ctices and determine the applicability of regulatory limitations prior to use. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. Not applicable. 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: EDS-T-7771 9 Release and Re
15、visions This standard was originated in March 1995. It was first approved by Engineering Standard Committee in March 1995. It was first published in March 1995. Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 5 NOV 2011 Apply new Engineering Standard Template. Limited use with no replacement (Polymer / Organic Material Lab Team) / 4 d3TE:4 64 957 . F9I957 ($4=E:4 68 ) =* (G)8*4G D4 )
