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Maintaining aged infrastructure can be challenging, especially when structures were designed with difficult-to-coat features, such as riveted construction, back-to-back plates, or skip welds. According to NACE SP0178 - Design, Fabrication, and Surface Finish Practices for Tanks and Vessels to be Lined for Immersion Service, these construction methods are not recommended for immersion service.
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The long term performance of any coating system will be limited by the ability of the applicator to achieve the best combination of surface preparation, application, and curing. In oil and gas facility construction, sometimes the most appropriate coating system is not the best available technology, but rather the system that ensures the highest probability for success based on the environmental conditions during application. An example is presented in which a zinc rich epoxy coating provides clear advantages over the specified inorganic zinc silicate due to circumstances specific to the particular application.
There are many approaches for rehabilitating deteriorated concrete. The options challenge applicators, estimators, and engineers when executing rehab projects. Selecting the cost-effective approach requires understanding the concrete condition, available coating systems, and level of effort to repair and coat the concrete. A well written specification balances a level of detail that conveys the specifier’s intent with opportunities for contractor innovation to provide facility owners with the best value.
This paper describes the recoating of the interior primary and secondary structural steel of an atmospherically exposed building that houses a solid waste transfer station. The basic chemistry and the benefits of moisture cured polyurethane coatings in cold and humid climates are discussed.
This standard provides criteria for the education, training, experience, knowledge, and skills required of Industrial Coating and Lining Applicators and Application Specialists to prepare and apply protective coatings. This standard may be used for certification of Industrial Coating and Lining Applicators and Application Specialists for other substrates or conditions, as considered appropriate by facility owners, contractors, or certifying agencies.
This paper is an overview of the NSRP Surface Preparation and Coating Panel’s (SPC) mission to reduce the cost of building, repairing and maintaining US Navy ships. It will showcase working and recently completed projects that have been implemented on the deck plates.
BASF has developed a novel crosslinking isocyanate-free coating technology based on carbodiimide chemistry. A polycarbodiimide crosslinker with suitable functionality for coating applications and ultra-low free monomeric isocyanate has been introduced to the market. We formulated a 60% solids industrial primer using the new isocyanate-free coating technology and applied it on different metal substrates.
Self-healing polymers are a new class of smart materials, which have the capability to autonomically repair themselves after damage, without the need for detection or repair by manual intervention. To expand the scope of practical applications, new self-healing chemistries have been developed and evaluated for use in a wide variety of applications including coatings.
A new and versatile waterborne solid epoxy resin dispersion with good flexibility and improved shear stability is presented. When this binder is used, high performance metal primers can be formulated without the use of anti-corrosion pigments. This is highly desirable since the toxicological effects of zinc phosphate and other zinc-based salts are causing environmental concerns.
This paper will discuss cost reduction of building and maintaining Navy Ships. Specifications, inspection, preparation, and application will also be discussed.
Quality Assurance/Quality Control (QA/QC), often referred to as inspection, is critical to the success of a protective coating or lining project. Several parties can and do get involved in inspection including the owner, specifier, third party inspector, general contractor, painting contractor, equipment supplier, and coating manufacturer.
Starting in the 1940’s, solution vinyl resin coatings were used extensively to protect steel structures in fluctuating immersion service from corrosion. However, these systems fell out of favor when more restrictive volatile organic compounds regulations were implemented in the 1990’s. Since then, traditional epoxy systems have become a workhorse in the protective coatings industry. Unfortunately, these materials tend to degrade in sunlight, and experience has revealed their service life to be suboptimal compared to legacy coatings systems such as vinyls