Products tagged with 'ph buffer'

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09236 pH Buffer Provides Corrosion Control Alternative for High Temperature Well Completions

Product Number: 51300-09236-SG

ISBN: 09236 2009 CP

Author: Mingjie Ke, Qi Qu and Paul H. Javora

Publication Date: 2009

$20.00

The study evaluated the effect of pH buffer on corrosion control of steel materials at elevated temperatures. Laboratory results of pH buffer in sodium chloride, potassium chloride, sodium bromide and sodium chloride/sodium bromide brines, Field case histories for buffered brine packer fluids in high-temperature, high-pressure wells.

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Naturally Buffered Iron Chloride Containing Solutions for SSC Tests of Low Alloy Steels

Product Number: 51324-20732-SG

Author: Florian Thebault; Hervé Marchebois

Publication Date: 2024

$40.00

Addition of controlled quantity of iron (II) chloride (FeCl2) in a test solution allows a tight control of the pH of Sulfide Stress Cracking (SSC) tests for low alloy steels. The natural buffering capacity is a consequence of the precipitation of iron sulfide corrosion products at a very early stage during the corrosion test. This work shows that FeCl2 can efficiently replace acetic acid for pH buffering of the SSC tests. NACE TM0177 Method A and D tests have been performed and showed similar environmental severity for SSC compared to standardized test solutions at a given pH. Thanks to a reduction of the corrosion rate in FeCl2 containing environments, which limits the increase of the applied stress during the test, the environmental severity appears to be fairly evaluated. Iron sulfide scale characterization and failure observations support the conclusion that FeCl2 containing solutions do not modify the SSC corrosion mechanism. This alternative test solution is well adapted to the determination of threshold pH for SSC.

Products tagged with 'ph buffer'

09236 pH Buffer Provides Corrosion Control Alternative for High Temperature Well Completions

Naturally Buffered Iron Chloride Containing Solutions for SSC Tests of Low Alloy Steels

Association for Materials Protection and Performance