ASTM D4350-15
(Test Method)Standard Test Method for Corrosivity Index of Plastics and Fillers
Standard Test Method for Corrosivity Index of Plastics and Fillers
SIGNIFICANCE AND USE
4.1 This test method provides a means for comparing the corrosive potential of plastics and fillers in humid atmospheres.
4.2 This test method is intended for use in research and evaluation.
SCOPE
1.1 This test method is designed for use in obtaining the specific conductance of a water extract of plastics and fillers. The magnitude of this conductance, called the corrosivity index, is an index of the likelihood that, in a humid atmosphere, metal surfaces in contact with these materials can be corroded due to galvanic action or direct chemical attack.
Note 1: There is no known ISO equivalent to this standard.
1.2 The values stated in SI units are to be regarded as standard.
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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 7.
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Designation:D4350 −15
StandardTest Method for
1
Corrosivity Index of Plastics and Fillers
This standard is issued under the fixed designation D4350; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 3. Terminology
1.1 This test method is designed for use in obtaining the 3.1 Definitions of Terms—For definitions of terms used in
specific conductance of a water extract of plastics and fillers. this test method associated with plastics issues refer to the
The magnitude of this conductance, called the corrosivity terminology contained in Terminology D883.
index, is an index of the likelihood that, in a humid
4. Significance and Use
atmosphere, metal surfaces in contact with these materials can
be corroded due to galvanic action or direct chemical attack.
4.1 This test method provides a means for comparing the
corrosivepotentialofplasticsandfillersinhumidatmospheres.
NOTE 1—There is no known ISO equivalent to this standard.
4.2 This test method is intended for use in research and
1.2 The values stated in SI units are to be regarded as
evaluation.
standard.
1.3 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
5.1 Conductance Bridge, Wheatstone type, with a range
responsibility of the user of this standard to establish appro-
from 1 to 250 000-Ω measured resistance, a built-in
priate safety and health practices and determine the applica-
potentiometer, a 1000 6 50-cycles per second oscillator, and a
bility of regulatory limitations prior to use. Specific precau-
sensitive null point indicator. The bridge shall be capable of
tionary statements are given in Section 7.
measuring resistance with an accuracy of 62%.
2. Referenced Documents
5.2 Conductivity Cell, dip-type, micro, for solutions of
2
medium conductance.The cell needs to have a cell constant of
2.1 ASTM Standards:
−1
approximately 1.0 cm . The borosilicate glass shall have a
D618Practice for Conditioning Plastics for Testing
maximum outside tube diameter of 12.7 mm, overall length of
D883Terminology Relating to Plastics
177.8 mm, chamber inside diameter of 9.5 mm, and chamber
D1193Specification for Reagent Water
3
depth of 50.8 mm.
E1Specification for ASTM Liquid-in-Glass Thermometers
E11Specification forWovenWireTest Sieve Cloth andTest
5.3 Drill, electric, capable of holding a 10.54-mm drill bit,
Sieves
and rotating at 500-r/min maximum speed.
E145Specification for Gravity-Convection and Forced-
5.4 Mill,suchaslaboratoryWileycuttingmillorequivalent.
Ventilation Ovens
5.5 Sieves, standard (alternative) sieve designations 425 µm
E691Practice for Conducting an Interlaboratory Study to
(No. 40), and 250 µm (No. 60) in accordance with Specifica-
Determine the Precision of a Test Method
tion E11.
E2251Specification for Liquid-in-Glass ASTM Thermom-
eters with Low-Hazard Precision Liquids
5.6 Analytical Balance, capable of determining mass to the
nearest 1.0 mg.
5.7 Oven, forced-ventilation type, with uniformity of tem-
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD20onPlastics
perature within 61% of the differential between oven and
and is the direct responsibility of Subcommittee D20.16 on Thermosetting Materi-
als.
Current edition approved June 1, 2015. Published June 2015. Originally
3
approved in 1984. Last previous edition approved in 2013 as D4350-13. DOI: The sole source of supply of the conductivity cell (Model No. 3403) known to
10.1520/D4350-15. the committee at this time is Yellow Springs Instrument Co., Inc., P.O. Box 279,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or YellowSprings,OH45387.Ifyouareawareofalternativesuppliers,pleaseprovide
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM this information toASTM International Headquarters. Your comments will receive
1
Standards volume information, refer to the standard’s Document Summary page on careful consideration at a meeting of the responsible technical committee, which
the ASTM website. you may attend.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4350−15
FIG. 1 Specific Conductance of 0.0100 Demal KCl
ambienttemperature,witharateofventilationof100to200air 5.9.2 Borosilicate Glass Erlenmeyer Flask, 65-mL actual
changesperhour,inaccordancewithSpecificationE145,Type capacity to bott
...
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.
Designation: D4350 − 13 D4350 − 15
Standard Test Method for
1
Corrosivity Index of Plastics and Fillers
This standard is issued under the fixed designation D4350; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This test method is designed for use in obtaining the specific conductance of a water extract of plastics and fillers. The
magnitude of this conductance may be taken as conductance, called the corrosivity index, is an index of the likelihood that, in a
humid atmosphere, metal surfaces in contact with these materials may becomecan be corroded due to galvanic action or direct
chemical attack; this is called the corrosivity index. attack.
NOTE 1—There is no known ISO equivalent to this standard.
1.2 The values stated in SI units are to be regarded as standard.
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 appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use. Specific precautionary statements are given in Section 7.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
D1193 Specification for Reagent Water
E1 Specification for ASTM Liquid-in-Glass Thermometers
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
E145 Specification for Gravity-Convection and Forced-Ventilation Ovens
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
3. Summary of Test Method
3.1 Specimens of plastics or fillers are immersed in distilled water and exposed to specified conditions of temperature and time.
The specific resistance of each of the solutions extracted from the test specimens is measured by using the specified conductivity
cell. The specific conductance is calculated from the data and is called the corrosivity index of the material.
3. Terminology
3.1 Definitions of Terms—For definitions of terms used in this test method associated with plastics issues refer to the
terminology contained in Terminology D883.
4. Significance and Use
4.1 This test method provides a means for comparing the corrosive potential of plastics and fillers in humid atmospheres.
4.2 This test method is intended for use in research and evaluation.
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.16 on Thermosetting Materials.
Current edition approved Dec. 15, 2013June 1, 2015. Published December 2013June 2015. Originally approved in 1984. Last previous edition approved in 20052013 as
D4350 - 00 (2005).D4350 - 13. DOI: 10.1520/D4350-13.10.1520/D4350-15.
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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4350 − 15
5. Apparatus
5.1 Conductance Bridge, Wheatstone type, with a range from 1 to 250 000-Ω measured resistance, a built-in potentiometer, a
1000 6 50-cycles per second oscillator, and a sensitive null point indicator. The bridge shall be capable of measuring resistance
with an accuracy of 62 %.
5.2 Conductivity Cell, dip-type, micro, for solutions of medium conductance. The cell should needs to have a cell constant of
−1
approximately 1.0 cm . The borosilicate glass shall have a maximum outside tube diameter of 12.7 mm, overall length of 177.8
3
mm, chamber inside diameter of 9.5 mm, and chamber depth of 50.8 mm.
5.3 Drill, electric, capable of holding a 10.54-mm drill bit, and rotating at 500-r/min maximum speed.
5.4 Mill, such as laboratory Wiley cutting mill or equivalent.
5.5 Sieves, standard (alternative) sieve designations 425 μm (No. 40), and 25
...
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