ASTM D7577-12(R2021) pdf free download

ASTM D7577-12(R2021) pdf free download.Standard Test Method for Determining the Accelerated Iron Corrosion Rating of Denatured Fuel Ethanol and Ethanol Fuel Blends
1. Scope
1.1 This test method measures the ability of inhibited and uninhibited Ethanol Fuel Blends defined by Specification D5798 and Denatured Fuel Ethanol defined by Specification D4806 to resist corrosion of iron should water become mixed with the fuel, using an accelerated laboratory test method. Corrosion ratings are reported based on a visual, numbered rating scale. 1.2 The values stated in SI units are to be regarded as standard. The values in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Sections 7 and 8. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
6. Apparatus
6.1 General—Two test apparatus have been evaluated and found to give comparable results. 6.1.1 Large sample volume (300 mL) apparatus specified in Test Method D665. 6.1.2 Small sample volume (30 mL to 75 mL) apparatus specified in 6.2. 6.2 Small Volume Test Apparatus (Fig. 1). 6.2.1 Compared to Test Method D665, the small volume test apparatus is lower in cost and allows for use of smaller volumes of samples to improve the safety of the measurement. Different apparatus and components that achieve the same results may be used. 6.2.2 Hot plate/stir plate or water bath capable of maintain- ing a temperature of 37 °C to 39 °C (98 °F to 102 °F) and stirring at a rate of 900 r⁄min 6 100 r⁄min. 6.2.3 150 mL to 200 mL borosilicate glass beakers to hold water to serve as a water bath. 6.2.4 50 mL to 150 mL borosilicate, flat bottom, glass test jar to hold test sample. 6.2.5 Jar covers made ofHDPE or other material compatible with ethanol, water and gasoline with three holes: 6.2.5.1 A hole to suspend the steel test rod into the test sample, 6.2.5.2 A hole for the thermometer,6.2.5.3 A hole for inserting a syringe needle to add water to the test sample. 6.2.6 PTFE (polytetrafluoroethylene) coated magnetic stir bar. 6.2.7 The small volume test apparatus shall be designed so that at least 50 % of the test rod surface is below the surface of the test material. 6.3 Grinding and sanding apparatus, capable ofrotating the steel test rod at 1700 r⁄min to 1800 r⁄min for manual sanding. 6.4 Timing device, capable of taking readings with a dis- crimination of 1 min or better. 6.5 Analytical balance, at least 100 g capacity, capable of weighing accurately to at least 0.001 g. 6.6 Temperature measuring device, Any thermometer with a temperature range that includes 37 °C to 39 °C (89 °F to 102 °F), with one degree graduation subdivisions and conform- ing to the requirements prescribed in Specification E2251. Alternatively, calibrated thermcouples may be used.
7. Reagents and Materials
7.1 Water—References to water shall be understood to mean reagent water of grade Specification D1193 Type II or better. 7.2 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the commit- tee on Analytical Reagents of the American Chemical Society, where such specifications are available. 3 Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination. 7.2.1 Acetic acid—(Warning—Corrosive. Health hazard.) 7.2.2 Acetone—(Warning—Flammable. Health hazard.) 7.2.3 Formic acid—(Warning—Corrosive. Health hazard.) 7.2.4 Isooctane (2,2,4-trimethylpentane)—(Warning— Flammable. Health hazard.) 7.2.5 Reagent alcohol—(Warning—Flammable. Health hazard.)–containing 90 % by volume ethanol, 5 % by volume isopropanol, 5 % by volume methanol and <0.1 % by volume water. N OTE 1—The specified reagent alcohol must be used to achieve equivalent results and ratings to that reported in this test method.