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The first written record of galvanizing describes how a French chemist named Melouin presented a method of coating iron by immersing it in molten zinc to the French Royal Academy in 1742. Sorel, another French chemist patented a process for coating iron with zinc after preparing it with 9% sulfuric acid followed by fluxing with ammonium chloride. Great Britain granted a patent for a similar process in 1837. By 1850, galvanizing had become a generally accepted practice for the protection of iron and steel with 10,000 tons of zinc per year used for the protection steel.
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Garnet has proven itself to be an exceptionally high-performance abrasive over the last 25 years. It is efficient, low dusting, consistent, environmentally friendly and worker safe. Knowledgeable blasters favor garnet and facility engineers specify it. As a very heavy and hard mineral, garnet offers a unique blend of high-performance characteristics unmatched by conventional dry abrasives. The only perceived negative to blasting garnet is a higher cost per ton.
This article will help you as a painting contractor to make the change to green products. Four things will be highlighted: How to identify “green” paint products, application methods, marketing their use and turning your project into a winner.
This paper will explore High-Performance Concrete Floor Coatings. It will include the basic characteristics of concrete as a floor substrate. We will examine the importance of preliminary inspection and surface preparation. We will discuss the basic generic types of coatings available and the selection of the appropriate system. We will conclude with an overview of the proper application of the coatings.
Painting contractors can maximize their profits by directly demonstrating the value in their pricing and service, looking for opportunities to increase the scope of work for each job and investing in efficient techniques that allow them to carry out more jobs.
State Departments of Transportation let contracts for cleaning and application of protective coatings for steel bridge structures, but often lack staff with the training and knowledge to properly address technical issues that may arise on the project. The department’s engineering and inspection staff may be very skilled at administering a wide variety of construction contracts but lack the experience necessary to deal with the unique issues that often arise on painting projects.
Statistical Process Control (SPC) has been implemented as a key component of Total Quality Initiatives with great success in every major industry worldwide. SPC is not commonplace in the industrial and commercial coatings application business. This paper introduces the audience to SPC and provides an example of it’s application in industrial coating surface preparation.
As a means of surface preparation for protective coatings, abrasive blasting provides proper surface roughness and increases the surface area, which are critical in achieving physical and chemical adhesion between steel surface and organic coatings. For application of high-performance coating in a new shipbuilding, the abrasive blasting cleaning is widely favored primarily because of its economic and performance benefits. The abrasive blasting, however, also requires the significant amount of labor hour, whereas its efficiency mainly depends on the blaster’s skill.
The use of passive fire protection (PFP) materials plays an integral role in mitigating fire risk in commercial buildings. Traditional application of these materials has been on-site following the erection of structural steel. Their mechanical durability, exposure to weather and in-flexibility have been a major concern for construction managers and architects.
This article discusses how companies that are facing or that may face lawsuits arising out of the historical use of lead-based paint can preserve and maximize their rights to coverage under CGL policies. The article analyzes the key terms in standard-form CGL policies and their application to lead paint claims. The article also provides pointers regarding the practical steps that companies can take now to preserve their rights going forward.
This presentation will report up-to-date findings of field trials, with a focus on the operational and equipment modifications required to successfully implement waste minimization and stabilization objectives.
Sports facilities are constructed in nearly every city of the country and the world. Just as these cities themselves are unique in many ways, the facilities that serve the city’s athletes must also be unique. Programs for the design of these facilities must consider natural and man-made environments. But just how do these affect design and maintenance considerations?