Abstract. A detailed study of AISI and stainless steels (SSs) has been conducted to correlate the degree of sensitization (DOS) measured by the. ASTM a Test, Intergranular Corrosion, IGC, ASTM A Practice, Copper – Copper Sulfate – 16% sulfuric acid, ASTM A – Practice E (Strauss Test). ASTM A Practice E test. This practice describes the procedure by which the copper-copper sulfate% sulfuric acid test is conducted to determine .

Author: Mesida Voshicage
Country: Angola
Language: English (Spanish)
Genre: Career
Published (Last): 23 December 2011
Pages: 426
PDF File Size: 10.59 Mb
ePub File Size: 2.88 Mb
ISBN: 557-7-23746-357-4
Downloads: 66791
Price: Free* [*Free Regsitration Required]
Uploader: Mek

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Methods for preparing the test specimens, rapid screening tests, apparatus setup and testing procedures, and calculations and report contents are described for each testing practice.

Metals like stainless steels and aluminum contain elements such as niobium and chromium, often integrated because of their natural corrosion resistance. Classification of the structure after A Practice A analysis will determine if the material is acceptable or if additional testing is required.

Discover perspectives, resources, and advice from our world-leading Engaged Experts. Based on your materials, application, and requirements, the other 4 methods provide specific focuses. This method is preferable for chromium depletions and corrosion in intermetallic phases.

Intergranular Corrosion Testing: An Overview of ASTM A262

Our knowledgeable scientists have the experience and expertise necessary to determine the most appropriate intergranular attack testing methods for your material while providing actionable results you can rely on.

The test evaluates the resistance of extra-low-carbon steels to sensitization and intergranular attack from welding or heat treatment processes.

The weight loss is calculated after each step, and reveals if the sample has been properly heat-treated. For example, in highly oxidizing solutions, intergranular attack can occur due to intermetallic phases, while attack of carbides may occur somewhat less oxidizing solutions.


Work Item s – proposed revisions of this standard. View more articles about Aerospace Oil and Gas Transportation. The Oxalic Acid test w only used to ensure that no corrosion exists; samples are labeled either “Acceptable” or “Suspect”.

ASTM A is a common intergranular corrosion testing method that can quickly screen batches of material to determine corrosion susceptibility. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

By using our website you consent to all cookies in accordance with our Cookie Policy. For example, many low-carbon and stabilized stainless steels e. 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. Historical Version s – view previous versions of standard.

G2MT Laboratories

Since high temperature processing such as heat treatment is a common practice, many manufacturers wish to perform intergranular corrosion qualification testing on each batch, to ensure that the material has been asmt correctly and does not show signs of corrosion susceptibility. Practice F, is a hour weight-loss based analysis that provides a quantitative measure of the materials performance, and is commonly used to analyze as-received stainless steels.

Intergranular corrosion shows up as the dark black lines around the grain boundaries.

Because it can be run quickly for screening, we often run a2622 test first. However, when a material is exposed to high temperatures for long periods of time, a process called sensitization may occur.

ASTM A Intergranular Corrosion Testing and Analysis

G2MT Labs is one of the few labs to offer all five ASTM A corrosion testing practices, as well as the expertise to help you determine w262 tests to use, what to do if a test fails, and other corrosion consulting as needed. Our laboratory is well organized, adequately equipped, and have competent staff who are trained to conduct these tests.


This test method describes the procedure for conducting the ferric chloride corrosion test for detecting the presence of detrimental intermetallic phases in Duplex Stainless Steels.

It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. Specimen 2a62 before soaking in boiling Ferric Sulfate-Sulfuric Acid solution. Xstm what you saw? Practice B, also known as the Streicher test, uses weight loss analysis to provide a quantitative measure of the materials performance.

ASTM A Testing: An Overview of Intergranular Corrosion | Element

The ASTM A tests can determine if the proper heat treatment was performed or if the alloys are in danger of intergranular corrosion occurring in use. The Copper Sulfate Test is especially effective for determining susceptibility to intergranular attack for low carbon steels. Strauss test specimens are boiled in a Copper Sulfate – Sulfuric Acid mixture for 15 hours. The oxalic acid test is commonly used before the Strauss test to determine if a sample is susceptible; samples that pass method A will generally show low corrosion rates in the Strauss test.

Although this test method uses some similar equipment, this method should not be confused with Test Method G Sample condition before soaking practicce Ferric chloride solution. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: This simple etching technique is used as a quick screening method to ensure that a material is free of intergranular corrosion susceptibility.

Choosing the correct method s rely on a complete understanding of your material and processes, as well as ashm concept of corrosion itself.