ASTM G48A PDF

ASTM G48 testing in ferric chloride solution allows a quick assessment of pitting corrosion resistance of stainless steels. Although service is rarely in media similar to this very aggressive test solution, there are similarities between ferric chloride solution and the environment within a corrosion pit that may develop during service in chloride solutions, eg seawater. Hence, this test has become accepted as a quality control or ranking test for stainless alloys and welds. There has been much debate about the most appropriate test temperatures, so if a weld fails the test criterion, it is worth checking that the test temperature was correctly specified.

Author:Mazucage Yorr
Country:Japan
Language:English (Spanish)
Genre:Automotive
Published (Last):28 October 2004
Pages:292
PDF File Size:4.63 Mb
ePub File Size:19.88 Mb
ISBN:614-9-96405-314-9
Downloads:28451
Price:Free* [*Free Regsitration Required]
Uploader:Kazrara



Historical Version s - view previous versions of standard. More G The results may be used for ranking alloys in order of increasing resistance to pitting and crevice corrosion initiation under the specific conditions of these methods. Methods A and B are designed to cause the breakdown of Type at room temperature. No statement can be made about resistance of alloys in environments that do not contain chlorides. Consequently, the degree of corrosion damage that occurs during testing will generally be greater than that in natural environments in any similar time period.

Therefore, grinding and pickling of the specimen will mean that the results may not be representative of the conditions of the actual piece from which the sample was taken. A h air passivation after grinding or pickling is sufficient to minimize these differences 8. The use of contoured crevice formers may be considered in such situations, but the use of a pitting test Practices A, C, or E should be considered.

Methods C, D, E and F allow for a ranking of alloys by minimum critical temperature to cause initiation of pitting corrosion and crevice corrosion, respectively, of stainless steels, nickel-base and chromium-bearing alloys in a standard ferric chloride solution. Other units are given in parentheses for information only. 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.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Scope 1. Link to Active This link will always route to the current Active version of the standard.

DEFICIENCIA DE ADENOSINA DEAMINASA PDF

Pitting and Crevice Corrosion Testing

Powered by mwForum 2. Not logged in American Welding Society Forum. By rodofgod Date Edited Hi All! I am rather hesitant in posting this, However, I will keep to my word for those who are intrested. In a previous post that has since been locked, I stated that I had also sent an email to Metrode, concerning the corrosive testing of duplex and super duplex filler wires, or as welded metal according to G48!

INTEGRACION POR SUSTITUCION TRIGONOMETRICA PDF

G2MT Laboratories

Historical Version s - view previous versions of standard. More G The results may be used for ranking alloys in order of increasing resistance to pitting and crevice corrosion initiation under the specific conditions of these methods. Methods A and B are designed to cause the breakdown of Type at room temperature. No statement can be made about resistance of alloys in environments that do not contain chlorides. Consequently, the degree of corrosion damage that occurs during testing will generally be greater than that in natural environments in any similar time period. Therefore, grinding and pickling of the specimen will mean that the results may not be representative of the conditions of the actual piece from which the sample was taken.

ENFOCUS OFFER NEO A STAND-ALONE PDF

G48 contains six different test methods for evaluating the pitting and crevice corrosion resistance of stainless and nickel alloys. These are:. However, these parameters can be modified to suit individual test needs. Note that these are not acceptance tests as written in G48 as there are no acceptance criteria. They can be used as acceptance tests if criteria e. Methods C through F are designed as incremental tests and require multiple specimens. These tests identify the minimum critical temperature needed to initiate pitting or crevice corrosion.

Related Articles