Astm g1

Designation: G 1 – 03

Standard Practice for

Preparing, Cleaning, and Evaluating Corrosion Test Specimens1
This standard is issued under the fixed designation G 1; 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(e) indicates an editorial change since the last revision or reapproval.

1. Scope 1.1 This practice covers suggested procedures for preparing bare, solid metal specimens for tests, for removing corrosion products after the test has been completed, and for evaluating the corrosion damage that has occurred. Emphasis is placed on procedures related to the evaluation of corrosion by mass loss andpitting measurements. (Warning—In many cases the corrosion product on the reactive metals titanium and zirconium is a hard and tightly bonded oxide that defies removal by chemical or ordinary mechanical means. In many such cases, corrosion rates are established by mass gain rather than mass loss.) 1.2 This standard does not purport to address all of the safety concerns, if any, associated with itsuse. 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 precautionary statements, see 1 and 7.2. 2. Referenced Documents 2.1 ASTM Standards: A 262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels2 D 1193 Specificationfor Reagent Water3 D 1384 Test Method for Corrosion Test for Engine Coolants in Glassware4 D 2776 Test Methods for Corrosivity of Water in the Absence of Heat Transfer (Electrical Methods)5 G 15 Terminology Relating to Corrosion and Corrosion Testing6 G 16 Guide for Applying Statistics to Analysis of Corrosion Data6
1 This practice is under the jurisdiction of ASTM Committee G01 on Corrosion ofMetals and is the direct responsibility of Subcommittee G01.05 on Laboratory Corrosion Tests. Current edition approved October 1, 2003. Published October 2003. Originally approved in 1967. Last previous edition approved in 1999 as G 1 – 90 (1999)e1. 2 Annual Book of ASTM Standards, Vol 01.03. 3 Annual Book of ASTM Standards, Vol 11.01. 4 Annual Book of ASTM Standards, Vol 15.05. 5 Discontinued,replaced by Guide G 96. See 1990 Annual Book of ASTM Standards, Vol 03.02. 6 Annual Book of ASTM Standards, Vol 03.02.

G 31 Practice for Laboratory Immersion Corrosion Testing of Metals6 G 33 Practice for Recording Data from Atmospheric Corrosion Tests of Metallic-Coated Steel Specimens6 G 46 Guide for Examination and Evaluation of Pitting Corrosion6 G 50 Practice for Conducting AtmosphericCorrosion Tests on Metals6 G 78 Guide for Crevice Corrosion Testing of Iron Base and Nickel-Base Stainless Alloys in Seawater and Other Chloride-Containing Aqueous Environments6 3. Terminology 3.1 See Terminology G 15 for terms used in this practice. 4. Significance and Use 4.1 The procedures given are designed to remove corrosion products without significant removal of base metal. This allows anaccurate determination of the mass loss of the metal or alloy that occurred during exposure to the corrosive environment. 4.2 These procedures, in some cases, may apply to metal coatings. However, possible effects from the substrate must be considered. 5. Reagents and Materials 5.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that allreagents conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society where such specifications are available.7 Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination. 5.2 Purity of Water—Unless otherwise indicated, references to water...