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In the oil and gas industry there is information on current fundamental training for contractors and certification programs that cover industry standards and practical aspects of selecting, specifying and using coatings safely, effectively and economically to protect structures in harsh oil and gas atmospheric environments. These certification programs are for both inspectors and contractors that provide quality assurance/quality control on industrial coating projects. Once implemented with a properly well-written specification for a specific substrate (steel, metal, previously coated), ensures a quality project for the owner.
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The Florida Department of Transportation (FDOT) spends over $50 million in steel bridge fabrication and shop painting annually. According to a recent Federal Highway Administration (FHWA) sponsored study by Appleman, approximately 7% of the cost of a steel bridge is budgeted for blast cleaning and primer application in most shops. FDOT knows that proper surface preparation and primer application are the best ways to assure long-term corrosion protection.
Shot blasting as a mechanical surface preparation process is widely used in finishing metallic parts. Sophistication in the use of this technique could range from simple manual systems to computer-controlled equipment for preparing aerospace and automotive components.
This paper will cover understanding the hot-dip galvanizing process and coating benefits, Identify the benefits of utilizing paint/powder coating with hot-dip galvanizing in a duplex system, Recognize the importance of communication and clear assignments of responsibility in the specification of successful duplex systems and differentiate between HDG surface conditions in order to properly prepare the zinc coating for paint/powder.
Composite repair systems’ performance relies heavily on the levels of adhesion between the initial layer of the composite system and the substrate. Enhanced adhesion translates to improved performance of the composite system since better bonding (whether mechanical or chemical) enhances the load transfer from the substrate to the composite layers as well as limit the porosity that would allow liquid or gas molecules to flow through. The aim of this study was to prove quantitatively how the APS atmospheric plasma surface preparation can improve the performance of composite repair systems whether on leaking or nonleaking defects.
This visual comparator is used with the latest version of NACE SP0178 (sold separately), mentioned in Appendix C, to determine whether welds are suitable for coating. This durable T Grade ABS plastic weld replica is molded from actual welds and includes 14 welds for comparison of various degrees of surface finishing (full-seam welds, skip welds, butt welds, lap welds, and others). Use of this visual aid will facilitate weld inspection by the end user.
This paper introduces the available technology of chemical coating removal as an alternative to mechanical coating removal by comparing and contrasting the advantages and disadvantages of each chemical coating removal technology. Due to the high cost and environmental drawbacks of mechanical methods of coating removal, chemical coating removal systems have advanced as a cost effective and environmentally friendly way to remove coatings that are highly cost effective on a per square foot basis cost comparison. The presentation will discuss all chemical coating removal technology, features and benefits.
To address questions and concerns in the protective and marine coatings market, new laboratory data has been generated regarding corrosion rates and mechanisms that will help eliminate some of the assumptions regarding the role of soluble salts. These assumptions include soluble salt types such as chloride, sulfate, and nitrate along with the resulting conjugate corrosion products.
ASTM D7234 was first published in 2005, and updated in 2012 with precision statistics. This paper will go into the history of the development of the test method, the procedure and interpretation details that are critical to using and applying this standard along with a discussion of the factors that affect the precision of this method.
When a project finally reaches the bidding stage, many of the owner’s questions and concerns regarding the project's outcome have been considered. However, given the ongoing effort to continually extend every assets useful service life, one important question that gets asked more and more is “How long is my coating system going to last?”
Few things in life improve quality, decrease costs and reduce the environmental impact. With the proper technology, using steel grit to prepare steel structures for coating can accomplish this.
Few things in life improve quality, decrease costs and reduce the Environment impact. With the proper technology, using steel grit to prepare steel structures for coating can accomplish this.