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Throughout their history, the value of vinyl and vinyl/acrylic coating systems has been well documented; from the superior corrosion protection of vinyl to the all-around durability and appearance that acrylics lend, vinyl and vinyl/acrylic coating systems are well known for their ability to protect as well as beautify all types of industrial, transportation, marine and hydraulic structures. Within the past few decades increasingly stringent air-quality standards and environmental regulations curtailed the use of the solvents used in many coating systems, including vinyls and vinyl/acrylics.
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Starting in the 1940’s, solution vinyl resin coatings were used extensively to protect steel structures in fluctuating immersion service from corrosion. However, these systems fell out of favor when more restrictive volatile organic compounds regulations were implemented in the 1990’s. Since then, traditional epoxy systems have become a workhorse in the protective coatings industry. Unfortunately, these materials tend to degrade in sunlight, and experience has revealed their service life to be suboptimal compared to legacy coatings systems such as vinyls
Vinyl coatings have long been used in the hydro industry for steel structures. As VOC regulations and product availability have changed, owners have moved toward alternative technologies to replace those systems. The intent of this information is to understand the status of vinyl technology, identify and discuss other systems that have historically been used as an alternative, and to review the possibilities of new technologies for these applications.
Concrete and other cementitious surfaces are porous materials that will allow water and soluble contaminants to penetrate the structure leading to degradation. The effects of degradation can include efflorescence, laitance and physical defects such as cracking and spalling. Waterproofing concrete can protect it from freeze/thaw cycles, increase chemical resistance, and provide protection to imbedded reinforcing steel.