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The use of traditional corrosion inhibitors in paints and coatings continues to be challenged from both an environmental and performance aspect. End users are demanding better corrosion performance and in many cases this cannot be achieved with traditional zinc or chromate type inhibitors. The use of VCIs(vapor corrosion inhibitors) in coating formulations has shown that in many systems they can replace the older technology or significantly improve the performance of the system by working in synergy with the existing inhibitors.
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The use of traditional corrosion inhibitors in paints and coatings continues to be challenged from both an environmental and performance aspect. End users are demanding better corrosion performance, and in many cases, this cannot be achieved with traditional zinc or chromate type inhibitors. The use of VCIs (vapor corrosion inhibitors) in coating formulations has shown that in many systems, they can replace the older technology or significantly improve the performance of the system by working in synergy with the existing inhibitors.
There is no confidence in the A923 Test Method C for weld procedurequalification of 25% Cr DSS on a consistent basis. The ability to obtain corrosionrates < 10 mdd is not achievable at 40°C for samples in the “as-welded”condition.
For too many people, quality is something nebulous and immeasurable. General terms like “craftsman like manner” have been used but with mixed results. What is required is a “team” effort where all parties involved understand not only the scope and desired outcome but also have a means of communicating what is meant by “craftsman like manner”. The impact of one part to the overall approach in advancing quality in coating operations, using qualified contractors, is discussed.
Corrosion is a ubiquitous phenomenon, which can have massive impacts on the functioning of industrial assets. The threat of corrosion is exacerbated in situations where regular corrosion inspections are difficult. The Virtual Corrosion Engineer (VCE) Project within Shell is intended to offer a solution to this problem by automatically assessing the corrosion rates and threat levels in assets due to a variety of corrosion mechanisms. The VCE system has been deployed in an asset progressively since 2019.
To restrain the failure of plate heat exchanger in customer boiler working fluid, the effect of crevice former type on the corrosion behavior of Type 316L (UNS S31603) stainless steel plate was investigated using electrochemical methods and surface analysis in chloride-containing synthetic tap water.
Coating formulators have demonstrated ingenuity in complying with stringent VOC regulations while keeping the same standard of high performance. Significant research and development in recent years has shown that two-component waterborne epoxies can deliver comparable performance to solvent borne epoxies, and that novel single-component waterborne coatings possess outstanding corrosion resistance and aesthetic properties.
The “Weakest Link” on any structure is found at the nut and bolt assemblies. Nuts and bolts are found on every structure. “The fate of any complex steel assembly may be determined by the vulnerability of its smallest and least considered components”. “The bolts or fasteners holding the assembly together are often the areas where corrosion starts first and where the effects of corrosion may have the most serious consequences”.
Located on the banks of the Kanawha River surrounded by the rugged Allegheny Mountains, the gilded lead-coated copper dome of Cass Gilbert’s 1932 West Virginia State Capitol has never successfully weathered the harsh climate nor withstood the test of time. Although beautifully detailed and successful at resisting water infiltration, the dome’s appearance was problematic soon after its completion and has remained so even after four significant refinishing campaigns - in 1946, 1961, 1977 and most recently in 1988.
Founded in 1888 and located in Media, PA (Delaware County), the Williamson Free School of Mechanical Trades is considered one of the finest trade colleges in the country. True to the School’s mission of preparing financially deserving young men to be useful and respected members of society, Williamson has a reputation for building men of skill and character.
The past 35 years have brought massive changes to the Protective Coatings industry. Increasing levels of regulatory oversight and the reduction in VOC emissions are among the more obvious impacts. However, change is also a reaction to the global trends occurring throughout the world: population growth, globalization/urbanization, climate change/global warming, the healthcare revolution and accelerated technology changes. All of these trends have and will continue to create new opportunities. How can our business model recognize and take advantage of these trends that create coatings opportunities?