Astm g48 method a pdf

Astm g4811 2015, standard test methods for pitting and crevice corrosion resistance of stainless steels and related alloys by use of ferric chloride solution, astm international, west conshohocken, pa, 2015. Astm g48 method a pdf example of pitting after corrosion testing in accordance with astm g48 method a. Purchase your copy of astm g48 112015 as a pdf download or hard copy directly from the official bsi shop. Astm a262 method c huey test is the same as that specified in iso 36511 not listed here. Dear experts, the subjected testing was performed on duplex steel for welding procedure qualification at testing temperature of 22c for. This study presents the modified astm g48 procedure. Astm g48 standard test methods for pitting and crevice corrosion resistance of stainless steels and related alloys by use of ferric chloride solution 1 is a common test to evaluate the crevice corrosion resistance of stainless steels and nickel alloys. Astm g48a pdf example of pitting after corrosion testing in accordance with astm g48 method a.

Astm g48 112015 standard test methods for pitting and crevice. Buy astm g r test methods for pitting and crevice corrosion resistance of stainless steels and. The standard is not precise on time but suggests 72 hours. Astm a262 method e is sometimes called the strauss test, and is the same as iso 36512 method a, except for the duration. Astm g48112015 standard test methods for pitting and. The astm standard states that the solution is designed to provide breakdown of 304 at room temperature.

Method a is designed to determine the relative pitting resistance of stainless steels and nickelbase, chromiumbearing alloys, whereas method b can be used for determining both the pitting and crevice corrosion resistance of these alloys. Do not include the depth of pits that intersect the edges of the specimen in the calculated average. Testing by astm g48 for pitting and crevice corrosion g2mt labs. Maximum allowable service temperatures and the astm g48. The product is wrought duplex but testing to g48 using method a is client specification requirement for methid procedure qualification at 22c for suggested 72 hours. Astm g 48 is a relatively severe test, but lack of definition in the standard can lead to variation of data. The astm ga test ferric chloride test is widely used for prequalification of corrosion.

Pdf accelerated pitting corrosion test of 304 stainless steel using. Corrosietesten voor lasverbindingen dl 1 lastechniek. Astmg48 standard test methods for pitting and crevice. Standard test methods for pitting and crevice corrosion. 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. Standard test methods for pitting and crevice corrosion resistance of stainless steels and related alloys by use of ferric chloride solution, astm international, west conshohocken, pa, 2011. Method a is the rapid screening method sodium hydroxide etch test for classification of etch structures of duplex stainless steels, and is preferable for quick analysis of. The product is wrought duplex but testing to g48 using method a is client specification requirement for welding procedure qualification at 22c for suggested 72 hours. Ferric chloride corrosion testing rolled alloys, inc. Highquality analysis of pitting and crevice corrosion per astm g48 methods af for stainless, duplex, and nickelbased alloys. When using stainless and duplex steels, astm g48 is widely used to ensure the quality of the material and resistance to pitting and crevice corrosion.

G48 method a is commonly called out for cast superduplex stainless with a 24 hour test period at 50c and 24hrs. Astm g48 standard test methods for pitting and crevice. Astm g48 method a astm testing materials code issues. Astm g48 112015 standard test methods for pitting and. Client is not accepting the results and require to perform the testing to. The presence of detrimental intermetallic phases is readily detected in all three tests, provided that a sample of appropriate location and orientation is selected. Corrosion testing to astm g48 using method a corrosion. A series of pitting corrosion tests on stainless steel specimen with different thickness were conducted and. Pitting and crevice corrosion resistance of stainless steels and related alloys by use of ferric chloride solution1. Method fcritical crevice temperature test for stainless steels. The material is normal duplex astm a790 uns 31803, smls pipe not the super duplex. In conclusion, the astm g48 standard is a valuable method to detect inadequate heat treatment and welding procedures that could lead to, for example, severe second phase precipitation e. We hired an independant 3rd party asym perform corrosion testing to g48 method a as per client.

Improved method for astm g48 corrosion testing of welds abstract. Comments on astm g48 standard test methods for pitting. All bsi british standards available online in electronic and print formats. Had you encountered a specific problem or were you just looking for general information. The test temperature of 22 c is too aggressive for lean duplex grades. Testing by astm g48 for pitting and crevice corrosion. Important characteristics of each of the test methods are described as follows. This test method may be used with other evaluation tests to provide a rapid method for identifying those specimens that are free of.

Astm a923 testing detecting intermetallic phases in. 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. Nace corrosion 2014 challenges in pre qualification corrosion. Astm g48 pdf example of pitting after corrosion testing in accordance with astm g48 method a. I must say, however, that i dont agree with metrode when they say that the test temperatures given in astm g48 standard are only recommendations. When a stainless steel wpq fails astm g48 testing twi. Astm g48 112015 standard test methods for pitting and crevice corrosion resistance of stainless steels and related alloys by use of ferric chloride solution. Test method cferric chloride corrosion test for classification of structures of duplex stainless steels sections 14 20. August 7, 2019 admin travel leave a comment on astm g48 pdf. Different weld qualities of super duplex stainless steel uns32750 were tested in the comparative study. Generally, the effect of various fabrication processes, such as welding, in stainless steel.

In many ways, g is ideal for use instead of methods cf as it is a more rapid method that can be performed within days instead of weeks. The last approved version of this historical standard. Pdf accelerated pitting corrosion test of 304 stainless. G48112015 standard test methods for pitting and crevice corrosion resistance of stainless steels and related alloys by use. Example of pitting after corrosion testing in accordance with astm g48 method a. Stephan, i totally disagree axtm your viewpoint, noble.

Standard test methods for pitting and crevice corrosion resistance of. The astm g48 practice a test we normally perform is a 72 hour test not 24 hrs. Method c of a923 references astm g48 and the test method in a923 is very similar to methods a and e in g48. Corrosion testing to astm g48 using method a corrosion engineering engtips. However, the criteria for evaluation to astm g48 method a is less than 1 gm2 minimumfor the 72 hour test and not 4 gm2 weight loss as specified in the request. The test temperature of 22 c is too aggressive for lean duplex grades such. This test should be avoided for most cras, except in the circumstances described below, in section 4.