NACE International

To provide a motivation and some thoughts that will, hopefully, generate enough interest in development and the eventual implementation of a strategy for addressing the back end of the fuel cycle for ARs. To identify key technical challenges to the back end for ARs. To propose a methodology that leverages current and future near-term R&D efforts in the evaluation of waste-stream treatment options that addresses some of the key technical challenges and will support the development of stable waste forms suitable for transportation, storage, and disposal.

Polyethylene encasement (PE) film has been utilized to effectively control external corrosion of iron pipe for over 70 years. During those years, various associated technological advancements have been made in polymer science and corrosion control, including inhibitors and biological sciences as related to microbiologically influenced corrosion (MIC). This paper gives a brief history of PE film as a method of corrosion protection and describes how adoption of these advancements has led to the development of an enhanced PE film, designed to control MIC and initial corrosion reactions. Additional complimentary corrosion control measures, that are considered here, are metalized zinc external coatings and cathodic protection used in conjunction with PE encasement. Case histories and field-based corrosion testing, in what is described as a uniquely severe corrosive soil environment found in the United States, are summarized.

Coating or paints are the most common materials for protecting the metallic structural surfaces against corrosion. A marine coating is designed for tough exposures that prevent serious breakdown of the basic coating layer(s) despite abrasions, holidays, or imperfections in the coating. Overprotection from an impressed or sacrificial cathodic protection can cause blistering, saponification of organic coatings, oxide dissolution, and loss of coating adhesion, and coating failure. Several steps need to be executed to experience the benefits of marine coatings. The steps are: surface preparation, quality of the coating application, coating inspection and quality control and monitoring of coated structures. Degradation or impact damage of the topcoats occurs frequently in normal marine service. Multilayered polymeric coatings are permeable to air and moisture, resulting in coating degradation and ultimately substrate corrosion. Coatings for offshore structures may be similar to those coatings applied on ships, but the operational profiles of ships verses offshore structures differ considerably.

The steel members and surfaces of the new Fifth + Broadway mixed-use complex in Nashville received a specialty fireproofing treatment.

When it comes to safety, leave no stone unturned. Delve into this roundup to find the latest safety products and trends.