ASTM D7577-12 (R2021) pdf free download.Standard Test Method for Determining the Accelerated lron Corrosion Rating of Denatured Fuel Ethanol and Ethanol Fuel Blends.
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.
7.3 Polishing Materiat—Ahrasive cloth, silicon carbide or aluminum oxide, 1(X) grit.
7.4 Pipetie—3 mL to 30 mL capacity, dependent on the amount of water required for a ratio of 10 to 1 test sample to water.
7.5 Graduated cvlinder—50 mL to 300 mL capacity. dependent on the test apparatus. with divisions of 5 % or better of the total volume. For example. 50 mL sample volume should be measured using a graduated cylinder with graduations of 2.5 rnL or less.
7.6 Steel Test Rods:
7.6.1 The steel test rod, when new, shall be 12.7 mm (0.5 in.) in diameter and approximately 68 mm (2 1V16 in.) in length exclusive of the threaded portion that screws into the PTFF. holder and shall he tapered at one end as shown in
7.6.2 The steel test rods shall be made of steel conforming to UNS Grade G10180 (AISI 1018) per Specification A108 (chemistry listed in Specification A29/A29M).
7.6.3 Discard reused rods when the diameter is reduced to 9.5 mm (0.375 in.).
7.7 PTFE holders for steel test rods—The PTFE holder screws onto the threaded end of the steel test rod.
8. Hazards
8. 1 Physical—Care should he taken when manually polishing the steel test rods to avoid injury to hands. This test method also uses aggressive organic solvents; safety glasses should he worn at all times.
8.2 Chemical—Flammahle, toxic and corrosive chemicals are used in this test procedure. It is the responsibility of the user to follow appropriate handling and storage procedures.
8.2.1 The test shall be run in a well-ventilated space or in a fume hood to avoid build up and exposure to fuel vapors. Test jar covers and secondary spill containers (water bath) are used to reduce the concentration of vapors and contain fuel spills.ASTM D7577 pdf download.