This paper will discuss utilizing temporary dehumidification and climate control equipment to reduce corrosion levels during the installation of coatings and linings applications; the science of Psychrometrics, the science behind dehumidification, and discuss how the components interact on a coatings project.
Research conducted at OakRidge National Laboratories in Oak Ridge, TN, National Research Council Canada, and many other institutions around the world have shown that controlling airflow through the building envelope is more important and effective in reducing heat loss and moisture transport than controlling vapor diffusion.
In 2000 the National Science Foundation estimated that the market for nanotechnology products will be over one trillion US dollars by 2015 and that the industry would employ over 200 million workers. These numbers have been subsequently quoted from funding applications to government policy documents, but at the halfway point many of the revolutionary and disruptive technologies predicted have failed to emerge. Indeed, seven years on from the inception of the National Nanotechnology Initiative, there appears to be little sign of a nanotechnology-based industry, although significant amounts of R&D are being undertaken by various industries.
Prompted by requests from Specifiers and Steel Shop Fabricators, a Non-Zinc coating has been developed that has attained a Class B Slip Coefficient rating and therefore can be applied to faying surfaces of slip-critical bolted connections. Results show that this product offers fast dry times and excellent corrosion resistance.
The Hal Adams Bridge is the only suspension bridge in the state of Florida. During the 2001 routine bridge inspection the bridge was identified as a candidate to be repainted. The authors Don Buwalda, Stephen Haney, and Greg Richards participated in the assessment, plan development, and project execution.
The primary structure of many outdoor baseball parks and football stadiums is exposed structural steel. These facilities are often located in major cities in areas that may present challenges in control of corrosion. The challenge is also manifested in the fact that the structural steel frame becomes an architectural feature which must be maintained as an aesthetic element.
Four separate concrete cooling towers at a coal fired electrical generation plant exhibited reinforcing steel corrosion causing concrete deterioration. The presentation will cover investigation of the corrosion sources, determination of the corrosion control solutions, implementation of the repair construction, and review of the corrosion measurements taken to prove effectiveness of the solution.
Approximately one cubic yard of concrete is placed annually per person on the planet with existing concrete estimated to be 30 times this amount (1). This presentation will discuss the basics of concrete, the various alternatives for control of corrosion in reinforced concrete structures, including prevention, protection, and mitigation, and strategies for selection of these alternatives. The pros and cons of each technique will be reviewed as well as the applicability considerations for the life cycle of the structure.