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Real-time measurement of organic coating performance for atmospheric galvanic corrosion protection

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The corrosion of aircraft costs the U.S. Department of Defense more than $20 billion annually and accounts for approximately 20% of all maintenance. Coatings are the most effective way to protect aircraft, but they have a finite lifetime and must be maintained or replaced before the underlying substrate is damaged by corrosion. Current aircraft maintenance practices call for coating inspections and repairs based on elapsed time and not on measurements of coating health.

Product Number: 51323-19036-SG
Author: Victoria Avance, Lindsay Davis, Brandi Clark, Fritz Friedersdorf
Publication Date: 2023
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In this laboratory work, zero resistance ammeter measurements were used to collect galvanic corrosion measurements for scribed traditional aerospace coating samples and e-coated samples in situ. The protective coating properties of traditional aerospace coatings were investigated under various environmental stressors including changes in salt loading severity and outdoor aging conditions. Both commercially available and developmental real-time galvanic corrosion monitoring devices were used to evaluate the performance of traditional aerospace coatings and e-coated and powder-coated samples in accelerated corrosion tests. Results indicated that while environment does not have an effect prior to coating damage, the initial severity once damage occurs can have a lasting effect on the galvanic corrosion rate.

In this laboratory work, zero resistance ammeter measurements were used to collect galvanic corrosion measurements for scribed traditional aerospace coating samples and e-coated samples in situ. The protective coating properties of traditional aerospace coatings were investigated under various environmental stressors including changes in salt loading severity and outdoor aging conditions. Both commercially available and developmental real-time galvanic corrosion monitoring devices were used to evaluate the performance of traditional aerospace coatings and e-coated and powder-coated samples in accelerated corrosion tests. Results indicated that while environment does not have an effect prior to coating damage, the initial severity once damage occurs can have a lasting effect on the galvanic corrosion rate.

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Laboratory Evaluation of Scale Inhibitors Used in OTSG Boilers for Control of Silica Related Scale

Product Number: 51323-18761-SG
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The production of heavy oil or bitumen depends upon continuous steam injection to fluidize the oil in the formation. Most of the boilers used in steam generation to enhance oil production are gas-powered once-through-steam-generation (OTSG), because OTSG’s can tolerate hard water and are relatively easy to maintain. Since an approximate 80% of feedwater is vaporized in a single pass, silica/silicate scales could form in the OTSG boiler if the silica content in the feedwater is not well controlled.
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Laboratory Synthesis and Performance Evaluation of A Phosphonate-type Scale Inhibitor

Product Number: 51323-18784-SG
Author: Shaohua Chen, Tianping Huang, Tao Chen
Publication Date: 2023
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Scaling is an important factor affecting oilfield production. The main reasons for scale formation are usually either the mixing of incompatible waters in production flow systems, for example, a formation of brine and seawater injected for maintaining downhole pressure, or changing the
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so that, once a scale layer is formed, it will continue to become thicker unless treated. Scale can block pore throats in the near-well bore region or in the well itself, causing formation damage and loss of well productivity.
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