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Composite repairs have been applied to pipelines and piping systems for structural reinforcement after external corrosion. Such repairs may consist of glass or carbon fibers embedded in a matrix of epoxy. Typically, these repairs are hand applied using either wet lay-up systems or prefabricated rolls of composite sleeve. In some applications, pipeline continued corrosion growth under composite repairs were reported using Inline Inspection (ILI) which raises a concern about the integrity of the metallic piping under composite repairs. When continued corrosion is detected by ILI, a difficulty is typically faced due to the inability to measure pipeline remaining thickness under such repairs. To resolve this challenge, this paper will discuss multiple inspection and corrosion monitoring techniques for metal loss under composite repairs. To measure the pipeline wall thickness due to internal corrosion, one or more of the three (3) Non-Destructive Testing (NDT) technologies namely; Dynamic Response Spectroscopy (DRS), Multi-skip Ultrasonic (MS-UT) and digital radiography were evaluated and found capable. To monitor for external corrosion, a scheduled visual inspection of the composite repair would be the first inspection step. If the composite repair appears to be intact then the visual inspection would suffice and the repair should be acceptable to its design life. If the original defect is external corrosion and a scheduled visual inspection of the composite repair shows damage to the composite repair then inspection to assess the integrity of the substrate must be used before permanently fixing the composite repair. For this scenario, digital radiography or MS-UT are recommended to assess the condition of the substrate
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The exopolysaccharides (EPS) are a class of renewable natural polymers, which present anti-fouling property. Therefore, it may be used as an alternative to conventional additives currently used in anti-corrosive paints. The copper oxide is an additive commonly used due to its anticorrosive and anti-fouling properties.
Electrochemical protection techniques have provided owners of reinforced concrete infrastructure a highly effective option for controlling reinforcement corrosion. This is particularly so for coastal assets, such as wharves and bridges which are exposed to seawater and in turn the corrosive effects thatfollow as chlorides migrate through the concrete cover to the reinforcement. Protection technologies have evolved considerably over the past 30 years in the Australian market.
Purpose of this report: • Explain the history of South Coast Air Quality Management District (SCAQMD) Rule 1113 – Architectural Coatings and the process that SCAQMD goes through to lower Volatile Organic Compounds (VOC) in architectural coatings. • Report on progress toward achieving low-VOC products with respect to the coating categories subject to Rule 1113 limits. • Report on progress on Reactivity and Availability assessment of solvents found in architectural coatings. • Report on future activities with regard to architectural and industrial maintenance coatings within the South Coast Air Basin.
PURPOSE OF THIS REPORT: • Explain the history of South Coast Air Quality Management District (SCAQMD) Rule 1113 – Architectural Coatings and the process that SCAQMD goes through to lower Volatile Organic Compounds (VOC) in architectural coatings. • Report on progress toward achieving low-VOC products with respect to the coating categories subject to Rule 1113 limits. • Report on progress on Reactivity and Availability assessment of solvents found in architectural coatings.
Compared to other polymeric materials, silicone offers greater performance in harsh environments. Inherently silicone possesses a large coefficient of thermal expansion (CTE), low modulus, and a low glass transition temperate (Tg). These attributes allow it to maintain elastomeric properties for continuous operation when exposed to extreme heat, cold, and/or UV radiation. Durability is the reason silicone materials are frequently employed as coatings and sealants.
Automated inspection systems are widely used in many industries. Tele-commuting enables an entire spectrum of virtual workers. Tele-inspection combines the automation hardware with a virtually present human-inspector to allow the transfer of manual dexterity in real-time over the internet.
There is a tremendous need for the protection of assets during processing, shipment and storage. Critical spares must be readily available and easy to place into service with minimal impact to the operation of equipment. The proven technology of VCIs (Vapor Corrosion Inhibitors) has long been used to preserve many of these assets using traditional mechanisms such as papers and films.
The use of temporary humidity control assisted in the recovery of multi-family housing structures in New Orleans after the city was ravaged by Hurricane Katrina. The process of temporary climate control during re-construction contributed to the overall quality control of moisture sensitive materials, predictable schedules, on-time completion and elimination of indoor air quality problems.
In this work, a specially made sample holder that can be fitted inside regular autoclaves was used for simulating sour TLC in the presence of methanol. The experiments showed that for 10 bar H2S + 10 bar CO2, the TLC mass loss rate was 0.2-0.3 mm/y of general corrosion without localized attacks.
The use of accelerated laboratory artificial weathering in coatings development is necessitated by the lengthy times required for natural outdoor weathering. Across a broad range of industries, weathering results from materials exposed in subtropical South Florida have become the benchmark to which accelerated test methods are compared.