Astm D 3634 – 99e1 pdf free download

Standard Test Method for
Trace Chloride Ion in Engine Coolants1

This standard is issued under the fixed designation D 3634; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

This standard has been approved for use by agencies of the Department of Defense.

1. Scope

1.1 This test method covers the determination of chloride
ion in engine coolants in the range from 5 to 200 pm in the
presence of up to 0.6 weight % mercaptobenzothiazole.

1.2 Other materials that react with silver ions will interfere.

1.3 Chloride in engine coolants containing an aryltriazole
instead of mercaptobenzothiazole can be determined directly
by this test method without pretreatment with hydrogen peroxide.

1.4 The values stated in SI units are to be regarded as the

1.5 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 hazards
statements are given in Section 7.

2. Referenced Documents

2.1 ASTM Standards:
D 1176 Test Method for Sampling and Preparing Aqueous
Solutions of Engine Coolants or Antirusts for Testing
D 1193 Specification for Reagent Water3
E 200 Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical

2.2 Manufacturing Chemists Association Document:4
MCA Chemical Safety Data Sheet SD-53

3. Summary of Test Method

3.1 The sample is first treated at a pH of 12 to 13 with
aqueous hydrogen peroxide to oxidize the mercaptobenzothia.

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