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The hardness values of weldments of supermartensitic stainless steels exceed limits for “sour service” and testing has to be done. Most testing has been done by procedure defined in EFC Publication No 172. Some observations during testing have led to a discussion on the relevance of the test methods and procedures.
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In order to simplify the measurement of electrochemical noise in field applications, three identical electrodes, one acting as reference electrode (RE), are often used. In this work, a measurement scheme, which employs two REs is proposed, which can reduce the error due to the RE's noise. An example of its implementation is also presented.
A standard carburization test method has been developed that will allow investigators to generate carburization data under uniform, repeatable test parameters and procedures. Test results are discussed with particular reference to test parameters and procedures, as well as the methods of sample evaluation.
New high-solids coatings are sometimes required to meet volatile organic compound (VOC) legislation. Lack of data on same needs accelerated test methods to evaluate performance. The test method must: • Be performed using commercially available equipment • Take a relatively short time period. • Correlate with real life exposure.
Concerning corrosion rate under iron sulfide deposits. A laboratory iron sulfide synthesis method and an iron sulfide under-deposit corrosion testing methodology were developed to better assess and monitor this type of corrosion in a simulated pipeline environment.
In the past the detrimental effects of pure erosion CO2 corrosion (sweet corrosion) and chloride corrosion and the combined effects of erosion-corrosion. This study introduces a new test facility and testing procedure that allows all three components to be measured simultaneously using a variety of testing techniques.
Analysis techniques that yield more information about effect of anomalies on fitness for service. RSTRENG calculations on phased array data, integration of UT data with structured light 3D data and the calculation of surface strain maps from structured light 3D imaging of dents.
A corrosion cracking assessment evaluated a 13Cr-5Ni-2Mo 110 ksi grade martensitic stainless steel as a potential well tubing material for oil and gas production from Gulf of Mexico reservoirs. Also, Stress Corrosion Cracking at low H2S/low temp/high acidity (pH<3.5) was tested by Cyclic Slow Strain Rate.
A brief overview of ASTM G48 – "Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution" is used for corrosion testing in the metals industry.
This study focuses on a better understanding of significant pitting corrosion on coating surface damaged carbon steels, or low alloy steels, during salt spray testing for automotive applications. Anodic cyclic polarization test was used to evaluate the severity of pitting corrosion, and to estimate the corrosion rate of raw materials.
Overview of coatings for a cyclic-temperature environment. Test method, including a heat cycle between 21 to 300 deg-C simulating the dehydrator operation and exposure to salt spray. The performances of the three coatings were evaluated using this method. Factors to be considered for coating selection in the cyclic-temperature environment are discussed.c
Traditional internal lining schemes for the storage/transport of crude oil & refined fuels may no longer be appropriate. The aggressive nature of crude oil (high temp. & more sour), high purity refined products & increased use of biofuels demand better linings & more certain test results. The focus of this paper is to review the trends in test methodology from the early 1990’s to present.