... of other alloys traditionally used by the oil and gas and chemical processing industries. Alloy 642 pitting corrosion stress corrosion cracking intergranular corrosion phase stability weldability impact energy clad pipe INTRODUCTION UNS ⁽¹⁾ N06625 (alloy 625) is one of the most commonly...

... and gas drilling. non-magnetic drill collars (NMDC) austenitic stainless steel sensitization intergranular corrosion localized corrosion INTRODUCTION Non-magnetic drill collars are used in directional drilling for the bottom part of the drill string. The drill bit below them incorporates magnetic...

... electrochemical tests in artificial seawater and under accelerated intergranular corrosion (IGC) tests. Samples were tested through potentiodynamic polarization (ASTM ⁽¹⁾ G61), under aerated and de-aerated environments, and in order to compare their IGC resistance, they were tested following ISO...

...It is notable that these tests are intended to be comparative tests, whereby the corrosion rate of annealed ‘control’ material should be compared to that of the sensitized material. There are several test methods available for intergranular corrosion testing, and the test method should be chosen...

... of the reactivation peak to the activation peak was correlated with weight loss in boiling nitric acid solution with Cr(VI) additions. UNS N06690 sensitization intergranular corrosion DL-EPR steam generator INTRODUCTION Ni-Cr-Fe alloy UNS N06690 is one of the current choices for nuclear power plant steam...

... electrochemical potentiokinetic reactivation (DL-EPR), and potentiodynamic polarization to characterize the intergranular corrosion and pitting corrosion resistance. The goals of this effort are to provide more details on the corrosion resistance of the HAZ for engineering applications. EXPERIMENTAL PROCEDURE...

... ratio and good weldability. Alloys containing more than 3 wt% Mg, when exposed to standard service temperatures for extended periods of time, can become sensitized and susceptible to localized corrosion; particularly intergranular corrosion (IGC). Many studies have investigated this IGC phenomenon...

..., no additional polishing was performed. This might introduce some artifact on the SKPFM images. Aluminum alloys Hydrogen desorption Scanning Kelvin Probe Force Microscopy (SKPFM) Intergranular corrosion Hydrogen embrittlement INTRODUCTION 2024 aluminum alloy (AA 2024) is widely used in aeronautics due...

... and patrol boats as well as in Navy ships have shown that the 5XXX series is prone to elemental migration and phase transformations at only slightly elevated temperatures (i.e., sensitization), leading to localized intergranular corrosion and stress corrosion cracking. In order to maximize structural...

...-Li alloys stress corrosion cracking exfoliation corrosion intergranular corrosion corrosion aggressive environments INTRODUCTION The requirements to present day materials have extended considerably the spectrum of aluminium alloys application. For example, extruded profiles of UNS A96063-T6...

... in reprocessing plants. In almost all nitric media, these materials remain in their passive state. However, in the presence of oxidizing ions, their corrosion potential may be shifted towards their transpassive domain. In this domain they can suffer intergranular corrosion which limits their lifetime. Oxidizing...

... the susceptibility of certain Ni-rich, Cr-bearing alloys to intergranular corrosion. ⁷ In accordance with the specification, samples were tested for 24 hours. The purpose of the oxidizing G28-A test is to “detect susceptibility to intergranular corrosion as influenced by variations in processing...

...Abstract For characterization of susceptibility to intergranular corrosion different test methods are used. These tests are immersion test, such as Streicher-, Strauss- or Huey- test, as well as electrochemical methods, like the EPR test (electrochemical potentiokinetik reactivation...

... temperature and cooling rate) on microstructure and corrosion properties of UNS 06625 ¹ used as a cladding material in oil and gas industry, was investigated. In addition, the effect of different annealing treatments was determined. Susceptibility to intergranular corrosion was investigated...

... materials for preventing galvanic corrosion of dissimilar metals. Corrosion non-metallic corrosion general corrosion galvanic corrosion crevice corrosion pitting corrosion selective leaching erosion corrosion stress corrosion cracking intergranular corrosion plastics rubber paints wood...

...The understanding developed over the last four decades on sensitization and intergranular corrosion due to segregation of certain elements in oxidizing environments has lead to development of a nitric acid grade (NAG) variety of type 304L (UNS S30403) stainless steel. Type 304L (NAG) has a tighter...

... has the same nominal composition as that of the base metal. These two factors should diminish the corrosion susceptibility of FSW welded joints. Al 5083 alloy intergranular corrosion friction stir welding sensitization INTRODUCTION The first studies on the corrosion resistance of FSW welds of Al...

...), “ Standard Test Method for Determining the Susceptibility to Intergranular Corrosion of 5xxx Series Aluminum Alloys by Mass Loss after Exposure to Nitric Acid ” ( West Conshohocken, PA : ASTM ). 3 Bovard   F. , “ Sensitization and Environmental Cracking of 5XXX Aluminum Marine Sheet and Plate...

... in comparison to the extent of intergranular corrosive attack previous the measurement series. In addition, optical microscopy was used to measure the depth of pits after testing for determination of CPT. All Streicher- and EPR-samples were additionally analysed by scanning electron microscopy. The microscope...

... part of the steel trays was visually corroded, with black, grey, or rusty brown colored corrosion products. The uncorroded steel surface no longer showed original shiny grey surface, rather a slightly greenish discoloration. Evidence of intergranular corrosion, however, was found in the visually un...