Published Technical Research Reports
Corrosion Testing Laboratories
Discover Cutting-Edge Research in Corrosion Science
Over the past 40 years, Corrosion Testing Laboratories has performed research and written papers on many issues for various industries. CTL Personnel have been primary authors, co-authors, and presenters of this work with the goal of technical progress. Some of these papers and presentations are shared below.
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Formicary (aka Ants Nest) CorrosionRead Results List Item 1
Formicary Corrosion is considered a significant problem in the air-conditioning industry. Approximately 10% of all preliminary failures of copper tubes in the HVAC industry are a direct result of formicary corrosion on a worldwide scale. Some manufacturers are detecting the localized formicary corrosion in new tubes as well as tubes with less than one year of service.
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An Assessment of ASTM F2129 Electrochemical Testing of Small Medical Implants – Lessons LearnedRead Results List Item 2
Much has been learned over a short period of time with respect to the corrosion assessment of small medical implant devices. Laboratory testing started with modifications of ASTM G 5 and G 61, which lead to the development of ASTM F 2129, and thence the fine-tuning of that specification to meet the intent of the FDA Guideline for non-clinical tests. The changes in electrochemical testing protocol with time are reviewed. Comparative data is presented addressing test environments, scan rates, statistical replication, alloy response, and acceptance criteria.
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Rouging (Discoloration) of Stainless SteelsRead Results List Item 3
Rouging (discoloration) of stainless steel is a problem most chronic in the pharmaceutical industry. Interior surfaces of high purity water units such as distillation units, storage tanks, process vessel, etc. are the areas where rouging is most likely to occur. Rouging is a thin film, usually reddish-brown or golden in color, of iron oxide or hydroxide, typically found on stainless steels.
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The Development of a Laboratory Test to Determine the Mechanisms and Effects of Organic Fluids on Copper CoilsRead Results List Item 4
Indoor corrosion failures of aluminum-finned copper-tube evaporator coils, and also in some systems without aluminum fins, is a menacing issue in the heating, ventilation, and air conditioning (HVAC) industry. Extensive laboratory testing has verified the development of a reproducible screening method to assess suspected contaminants of producing premature failures of copper tube resulting from a very localized form of corrosion known as “formicary corrosion” [a/k/a “ant nest corrosion”]. This paper provides a historical perspective on formicary corrosion and various mechanisms.
