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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.
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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.
High Pressure and High Temperature wells are very critical and require special attention to avoid well integrity issues. High pressure requests the use of very high strength low alloyed steels, above 965 MPa (140 ksi), while even trace of hydrogen sulfide implies significant partial pressures of H2S, much higher than the limit of 0.05 psi (3.5 mbar) provided by NACE MR0175 / ISO 15156 standard. Consequently, and despite a high temperature that reduces the risk of cracking, it is crucial to assess the resistance to Sulfide Stress Cracking of materials. However low alloyed steels experience high corrosion rates when exposed to standardized test solutions at elevated temperatures, leading to difficulties of controlling the mechanical stress loading, with a load rising in NACE TM0177 Method A and declining in four-points bending test. In addition, close attention shall be paid to both the evolution of the mechanical properties of the materials with the temperature and the appropriate sequence of sour gas introduction with regards to the temperature control. This paper discusses the most appropriate testing protocol for overcoming these issues and provides experimental results obtained in the frame of the qualification of 965 MPa (140 ksi) controlled yield grade for HPHT applications.