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Industries such as oil and gas, marine, cleaning and protective coatings face many changes and challenges from environmental, safety and other regulatory agencies. Most of these changes have to do with containment regulations and minimizing dust in open air blast environments. With these regulations now in place, contractors are looking for alternatives to traditional dry blasting.
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Thermally insulated pipelines have wide networks globally that are used to transport various chemicals, hydrocarbons as well as steam. CUI (corrosion under insulation), external SCC (stress corrosion cracking) and corrosion fatigue are some of the prominent damage mechanisms which may occur on the external surface of insulated pipes/ pipelines that in turn jeopardize the long-term integrity and operations. The moisture is undoubtedly the key contributor behind the above said external degradations of metallic surfaces and can come under thermal insulations via seepage and/ or condensation. Various factors that influence the extent of moisture intrusion are the design of insulated system(s), type and age of insulation, operating temperature of pipeline(s) as well as environmental and neighborhood conditions.
Moisture testing of concrete substrates has become a common practice in the floor coatings industry. Even though most contractors and field technicians are capable of performing the testing, they don’t really understand what the data they are collecting means, other than the acceptance criteria established by the product manufacturer of the coating or flooring being installed.
The importance of moisture testing of concrete floors cannot be stressed enough. Moisture is a leading cause of coatings failures on concrete floors. There are many ways moisture can affect floor coatings on concrete. Moisture testing alone is not sufficient enough at detecting all of the potential problems. Inspecting a building prior to performing any tests will provide a much clearer picture of the potential problems moisture in both liquid and vapor form can pose.
Cases illustrating the capability of the multi-electrode array in detecting the initiation and propagation of localized corrosion and coating failure: (i) Monitoring localized corrosion…(ii) Visualizing passivity, its breakdown…(iii) Imagining coating disbondment under overprotection.
Steel rebars in concrete structures are usually protected from corrosion by a thin layer of passive film, which is formed due to the high alkalinity of concrete pore solution.1-2 However, this protective passive film could be damaged by penetration of chloride into concrete structures in marine environments or exposure to the use of de-icing salt for the removal of snow and ice in winter times.3 Penetration of chloride would impair the passive film locally and initiate pitting corrosion.
The World Health Organization (WHO) has reported a 20-40% increased risk of certain types of cancer, lung cancer in particular, for those who come into regular contact with, or work with paint. This paper will give a highlight on the challenges that are facing the adoption of green paints in a variety of applications and the current status for that including paint formulations, supply chain, and community education.
Corrosion of metallic structures is a ubiquitous problem in industries such as power generation, oil and gas, pulp and paper, metals processing etc. which also results in significant financial losses. According to the National Association of Corrosion Engineers (NACE) International report, the global cost of corrosion was ~ 2.5 trillion USD in 2013 - close to 3.4 percent GDP of the entire world. The use of corrosion inhibitors is one of the most effective and economical ways to mitigate corrosion of metal and alloy components. Corrosion inhibitors are substances that are added in small quantities in corrosive media to protect metal and alloy components from corrosion.
Many coating product data sheets call for surface profiles of 3-4 mils. Others call for 1.5-2 miles surface profile for a very similar coating type – why should this be? To start to understand this we need to first of all look at why we measure the surface profile on steel surfaces. It pretty much comes down to two main things.
Control de humedad y temperatura se usa para obtener mejor calidad de recubrimientos. Para ingenieros y contratistas quienes hacen especificaciones para proyectos de recubrimiento de tanques y espacios cerrados.
为钢质液舱/储罐、船舶/容器以及其它密闭空间的 涂装/加衬里所进行的表面处理、施工和 固化过程中的减湿和温度控制 How dehumidification and temperature control are being used to achieve higher-quality coating/lining projects.
HISTORICAL DOCUMENT. Reprinted March 1996.
This NACE technical committee report provides currently accepted practices for the design of insulated surfaces and the selection of protective coatings for carbon steel and austenitic stainless steel surfaces under thermal insulation and cementitious fireproofing. It is directed primarily toward the process industry, which has experienced the largest number of severe corrosion problems of vital parts and equipment, often leading to costly repairs or replacement.