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An important segment of the high-performance protective coatings market is weatherable, direct-to-metal coatings. Coatings that weather well and provide corrosion protection are recommended for direct-to-metal applications, due to the dual benefits of ease of application and good asset protection. However, performance can vary widely based on the coating type and substrate preparation, with performance often rated by accelerated corrosion testing.
An important segment of the high-performance protective coatings market is weatherable, direct-to-metal coatings. Coatings that weather well and provide corrosion protection are recommended for direct-to-metal applications, due to the dual benefits of ease of application and good asset protection. However, performance can vary widely based on the coating type and substrate preparation, with performance often rated by accelerated corrosion testing. Coatings available today that offer direct-to-metal application with excellent weatherability include polyurethanes, polyaspartics, non-isocyanate coatings, and polysiloxanes. Substrate preparation for high-performance protective coatings typically includes any one of many common passivation surface treatments, or white or near-white metal blast preparation (SSPC-SP5 or SP10). With the importance of direct-to-metal coating performance, it is beneficial to compare the various weatherable technologies for direct-to-metal performance over a few different surface preparations.
Traditional zinc rich primers are the primer of choice during new construction of assets placed offshore for oil & gas production. However, during maintenance, zinc rich primers are not used because of difficulties of having good surface preparation and controlling applied dft to prevent cracking. This paper will examine the performance of new, activated zinc rich epoxy primers compared to conventional zinc rich epoxy primers on steel prepared to different surface profiles using standard techniques of today.
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Surface conditioning is the first step in building efficient corrosion protection on a part or structure. Key concerns during this step include, how to create a stronger anchor-profile and how to efficiently remove previously coated, damaged, or corroded elements from a materials surface prior to coating. The ideal solution must consider three areas of the surface conditioning process: finish quality, cleaning efficiency and total cost.
California Water Service (Cal Water) has had a team dedicated to the maintenance of its water tank infrastructure since the 1970s. The Team faces significant challenges as it strives to maintain the reliability of more than 450 water tanks throughout the State of California. Some of these challenges include tighter State regulations, increased visibility from the public, limited resources, aging infrastructure, and an aging workforce that will take their valuable institutional knowledge into retirement with them.