ASTM D7671-10(2015)
(Test Method)Standard Test Method for Corrosiveness to Silver by Automotive Spark–Ignition Engine Fuel–Silver Strip Method
Standard Test Method for Corrosiveness to Silver by Automotive Spark–Ignition Engine Fuel–Silver Strip Method
SIGNIFICANCE AND USE
4.1 Crude petroleum contains sulfur compounds, most of which are removed during refining. However, of the sulfur compounds remaining in the petroleum product, some can have a corroding action on various metals and this corrosivity is not related to the total sulfur content. In addition, fuels can become contaminated by corrosive sulfur compounds during storage and distribution. The corrosive effect can vary according to the chemical types of sulfur compounds present.
4.2 The silver strip corrosion test is designed to assess the relative degree of corrosivity of a petroleum product towards silver and silver alloys.
4.3 Reactive sulfur compounds present in automotive spark-ignition engine fuels under some circumstances can corrode or tarnish silver alloy fuel gauge in-tank sender units (and silver-plated bearings in some 2-stroke cycle engines). To minimize or prevent the failure of silver alloy in-tank sender units by corrosion or tarnish, Specification D4814 requires that fuels shall pass the silver strip corrosion test.
SCOPE
1.1 This test method covers the determination of the corrosiveness to silver by automotive spark-ignition engine fuel, 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. Procedure A involves the use of a pressure vessel, whereas Procedure B involves the use of a vented test tube.
1.2 The result of the test is based on a visual rating that is classified as an integer in the range from 0 to 4 as defined in Table 1.
1.3 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
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. For specific warning statements, see 6.1 and Section 7.
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Designation: D7671 − 10 (Reapproved 2015)
Standard Test Method for
Corrosiveness to Silver by Automotive Spark–Ignition
1
Engine Fuel–Silver Strip Method
This standard is issued under the fixed designation D7671; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E1Specification for ASTM Liquid-in-Glass Thermometers
2.2 Energy Institute Standard:
1.1 This test method covers the determination of the corro-
IP227Determination of Corrosiveness to Silver ofAviation
siveness to silver by automotive spark-ignition engine fuel, as
3
Turbine Fuels–Silver Strip Method
defined by Specification D4814, or similar specifications in
other jurisdictions, having a vapor pressure no greater than
2.3 ASTM Adjuncts:
4
124kPa(18psi)at37.8°C(100°F),byoneoftwoprocedures.
Color Standard for Tube Deposit Rating
Procedure A involves the use of a pressure vessel, whereas
Procedure B involves the use of a vented test tube.
3. Summary of Test Method
1.2 The result of the test is based on a visual rating that is 3.1 This test method covers two procedures. Procedure A
classified as an integer in the range from 0 to 4 as defined in
involves the use of a pressure vessel (to prevent the loss of
Table 1. volatile components in the sample), whereas Procedure B
involves the use of a vented test tube. In both procedures, a
1.3 The values stated in SI units are to be regarded as the
freshly polished silver strip is suspended in 30mL of sample
standard. The values in parentheses are for information only.
whichisheatedto50°C 61°Cforadurationof3h 65min.
1.4 This standard does not purport to address all of the
At the end of the heating period, the silver strip is removed,
safety concerns, if any, associated with its use. It is the
washed and the color and tarnish level assessed against the
responsibility of the user of this standard to establish appro-
requirements in Table 1.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For specific
4. Significance and Use
warning statements, see 6.1 and Section 7.
4.1 Crude petroleum contains sulfur compounds, most of
2. Referenced Documents which are removed during refining. However, of the sulfur
2 compoundsremaininginthepetroleumproduct,somecanhave
2.1 ASTM Standards:
a corroding action on various metals and this corrosivity is not
D130Test Method for Corrosiveness to Copper from Petro-
relatedtothetotalsulfurcontent.Inaddition,fuelscanbecome
leum Products by Copper Strip Test
contaminated by corrosive sulfur compounds during storage
D3241Test Method for Thermal Oxidation Stability of
and distribution.The corrosive effect can vary according to the
Aviation Turbine Fuels
chemical types of sulfur compounds present.
D4057Practice for Manual Sampling of Petroleum and
Petroleum Products 4.2 The silver strip corrosion test is designed to assess the
D4177Practice for Automatic Sampling of Petroleum and relative degree of corrosivity of a petroleum product towards
Petroleum Products silver and silver alloys.
D4814Specification for Automotive Spark-Ignition Engine
4.3 Reactivesulfurcompoundspresentinautomotivespark-
Fuel
ignition engine fuels under some circumstances can corrode or
tarnish silver alloy fuel gauge in-tank sender units (and
1 silver-plated bearings in some 2-stroke cycle engines). To
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and are the direct responsibility
minimize or prevent the failure of silver alloy in-tank sender
of Subcommittee D02.05.0C on Color and Reactivity.
Current edition approved Oct. 1, 2015. Published December 2015. Originally
ɛ1
approved in 2010. Last previous edition approved in 2010 as D7671–10 . DOI:
3
10.1520/D7671-10R15. Withdrawn without replacement in 2001. Copies of IP 227/99 can be obtained
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or at The Publications Department, Energy Institute, 61 New Cavendish Street,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM London, W1G 7AR, United Kingdom.
4
Standards volume information, refer to the standard’s Document Summary page on Available from ASTM International Headquarters. Order Adjunct No.
the ASTM website. ADJD3241. Original adjunct produced in 1986.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7671 − 10 (2015)
TABLE 1 Silver Strip Classifications
NOTE 1—Classifications provided by IP 227 Determination of Corro-
s
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: D7671 − 10 D7671 − 10 (Reapproved 2015)
Standard Test Method for
Corrosiveness to Silver by Automotive Spark–Ignition
1
Engine Fuel–Silver Strip Method
This standard is issued under the fixed designation D7671; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Corrected unit in 9.2.1 editorially in July 2012.
1. Scope
1.1 This test method covers the determination of the corrosiveness to silver by automotive spark-ignition engine fuel, 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),(18 psi) at 37.8 °C (100 °F), by one of two procedures. Procedure A involves the use of a pressure vessel,
whereas Procedure B involves the use of a vented test tube.
1.2 The result of the test is based on a visual rating that is classified as an integer in the range from 0 to 4 as defined in Table
1.
1.3 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
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. For specific warning statements, see 6.1 and Section 7.
2. Referenced Documents
2
2.1 ASTM Standards:
D130 Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test
D3241 Test Method for Thermal Oxidation Stability of Aviation Turbine Fuels
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D4814 Specification for Automotive Spark-Ignition Engine Fuel
E1 Specification for ASTM Liquid-in-Glass Thermometers
2.2 Energy Institute Standard:
3
IP 227 Determination of Corrosiveness to Silver of Aviation Turbine Fuels–Silver Strip Method
2.3 ASTM Adjuncts:
4
Color Standard for Tube Deposit Rating
3. Summary of Test Method
3.1 This test method covers two procedures. Procedure A involves the use of a pressure vessel (to prevent the loss of volatile
components in the sample), whereas Procedure B involves the use of a vented test tube. In both procedures, a freshly polished silver
strip is suspended in 30 mL 30 mL of sample which is heated to 5050 °C 6 1°C1 °C for a duration of 3 h 6 5 min. 3 h 6 5 min.
At the end of the heating period, the silver strip is removed, washed and the color and tarnish level assessed against the
requirements in Table 1.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and are the direct responsibility of
Subcommittee D02.05.0C on Color and Reactivity.
Current edition approved Oct. 1, 2010Oct. 1, 2015. Published November 2010December 2015. Originally approved in 2010. Last previous edition approved in 2010 as
ɛ1
D7671 – 10 . DOI: 10.1520/D7671–10.10.1520/D7671-10R15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Withdrawn without replacement in 2001. Copies of IP 227/99 can be obtained at The Publications Department, Energy Institute, 61 New Cavendish Street, London, W1G
7AR, United Kingdom.
4
Available from ASTM International Headquarters. Order Adjunct No. ADJD3241. Original adjunct produced in 1986.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7671 − 10 (2015)
TABLE 1 Silver Strip Classifications
NOTE 1—Classifications provided by IP 227 Determination of Corro-
siveness to Silver of Aviation Turbine Fuels–Silver Strip Method.
NOTE 2—Distinctions between Classifications 1 and 2 are made using
The Color Standard for Tube Deposit Rating (referenced in Test Method
D3241) in accordance with 11.1.1.
Classification Designation Description
0 No tarnish Identical to a freshly pol-
ished strip, but may have
some very light loss of lus-
ter
1 Slight tarnish Faint brown or white discol-
oration of strip (see
...
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