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Standard Test Method for Determination of Corrosiveness to Silver by Automotive Spark-Ignition Engine Fuel—Thin Silver Strip Method (Includes all amendments And changes 12/3/2015).
Automaticky preložený názov:
Štandardná skúšobná metóda pre stanovenie koróznej agresivity do striebra Automotive zážihového motora Palivá & ndash; Thin Silver Strip Method
NORMA vydaná dňa 1.10.2010
Označenie normy: ASTM D7667-10e2
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.10.2010
Kód tovaru: NS-38914
Počet strán: 7
Približná hmotnosť: 21 g (0.05 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
automotive gasoline, corrosiveness to silver, silver corrosion, silver strip, ICS Number Code 75.160.20 (Liquid fuels)
Significance and Use | ||||||||||||||||
Crude petroleum contains sulfur compounds, most of which are removed during refining. However, of the sulfur compounds remaining in the petroleum product or introduced into the fuel during storage and distribution, some can have a corroding action on various metals and this corrosivity is not necessarily related directly to the total sulfur content. The effect can vary according to the chemical types of sulfur compounds present. The silver strip corrosion test is designed to assess the relative degree of corrosivity of a petroleum product towards silver and silver alloys. Under some circumstances, reactive sulfur compounds present in automotive spark-ignition engine fuels can tarnish or even corrode silver alloy fuel gauge in-tank sender units or silver-plated bearings (in 2-stroke cycle engines). To minimize or prevent the failure of silver alloy in-tank sender units by tarnish or corrosion, Specification D4814 requires that fuels shall pass a silver strip corrosion test. |
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1. Scope | ||||||||||||||||
1.1 This test method covers the determination of the corrosiveness to silver by automotive spark-ignition engine fuel (for example, gasoline), as defined by Specification D4814 or similar specifications in other jurisdictions, having a vapor pressure no greater than 124 kPa (18 psi) at 37.8°C (100°F) by one of two procedures. 1.1.1 Procedure A—Involves the use of a pressure vessel. 1.1.2 Procedure B—Involves the use of a vented test tube. 1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only. 1.3 WARNINGMercury has been designated by many regulatory agencies as a hazardous material that can cause central nervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Material Safety Data Sheet (MSDS) for details and EPA’s websitehttp://www.epa.gov/mercury/faq.htmfor additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law. 1.4 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||||||||||||||
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