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Because of its hardness, dimensional tolerance and resistance to hydrogen, cadmium plating has been used to protect steel components in marine environments. However, Cadmium is thought to be toxic and a search is on for an alternative. In this paper, cadmium and zinc-nickel plating/coating were compared in water immersion, temperature cycling, rain, humidity, and salt fog testing.
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AC corrosion experiments were done on two kinds of typical soil simulants with different contents of (Ca2+), (Mg2+) and (Na+) to study the effects of environmental and cathodic protection parameters on AC corrosion rates.
On November 4, 1993, OSHA’s Lead in Construction Standard became the law of the land. Initially, (and to some extent today) the small residential contractor community reacted with complete outrage due to marketability fears, many claiming that they would simply stop working on “old houses.” Industrial contractors along with the larger residential and commercial contractors often at first ignored or complied in a lackadaisical manner with these laws, continuing to work “as it’s always been done.”
This paper will discuss utilizing temporary dehumidification and climate control equipment to reduce corrosion levels during the installation of coatings and linings applications; the science of Psychrometrics, the science behind dehumidification, and discuss how the components interact on a coatings project.
An understanding of the relationship between color and our environment remains an area in which much research has been conducted; yet, we are ever fascinated with the topic of color and the nuances it has yet to unfold. Our work aims to begin a dialogue regarding color trends, color application in an environment, the psychological impact of color and an understanding of the balance between these philosophies.
Knowledge of the localized corrosion environment on a metal substrate can provide the critical link between atmospheric data and corrosion morphology and can enable the formation of a framework to predict service life as a function of environment. Over the last few decades the analytical characterization of bare metal surfaces undergoing atmospheric corrosion has improved, resulting in a more complete understanding and consideration of the environmental parameters involved. However, the corrosion processes and the role that the environmental parameters play in what is a multiphase system is rather complex involving chemical reactions and equilibria, ionic transport phenomena, and gaseous, aqueous and solid phases.
Case histories & illustrations of specific forms of corrosion. General, localized & galvanic corrosion, environmental cracking, erosion-corrosion, cavitation & fretting. Intergranular corrosion, dealloying & high-temperature corrosion. 1982 NACE
In the past, the present and undoubtedly in the future, coating specifications will be written and included in bid packages that will end up on your desk, mine and our fellow colleagues. Often these specifications are poorly written, boiler plated or haphazardly thrown together to hopefully provide us with enough information to successfully win and complete a given contract.
Published reports of laboratory tests and plant experience pertaining to the cracking of steels in wet H2S service. Environmental, fabrication, and metallurgical parameters involved in the cracking process.
The standard type of chemicals long used as oilfield corrosion inhibitors are so-called filmforming molecules carrying a positive net charge. More specifically, these additives belong to e.g. the classes fatty amines, alkoxylated fatty amines, amidoamines, imidazolines, pyridinium quats, and quarternary ammonium compounds like alkyl benzyl quats. Anionic molecules, predominantly phosphate esters, may sometimes also be used as stand-alone inhibitors or as enhancers in formulations with a base inhibitor of the abovementioned type.
Optimizing power generated from wind needs bigger improved designs and windy conditions, thus increasing installations offshore. As component costs decrease and processes improve, it can be profitable for farm developers to go further from shore into deeper waters and high-risk areas. In addition, the lifecycle expectancies of a coating system have developed along the way, moving from a typical >15 years expected lifetime in a given environment, to now >25 years.