Galvanic Corrosion of High-Temperature Low-Sag (HTLS) High Voltage Conductors: New Materials - New Challenges

High-Temperature Low-Sag (HTLS) high voltage overhead conductors offer higher operating temperatures, reduced resistance and less sag than conventional designs. With up to twice the current capacity for the same diameter conductor, they may help ease the power shortage in the constantly increasing electricity demand, but there might be some concerns about their corrosion resistance. These new conductors use materials relatively new to the power industry, such as advanced carbon fiber polymer matrix composites and unique metal matrix composites/nano-composites predominantly used in aerospace industries. This study has made an initial assessment of potential galvanic corrosion problems in three very different HTLS designs: ACCC (Aluminum Conductor Composite Core), ACCR (Aluminum Conductor Composite Reinforced) and ACSS (Aluminum Conductor Steel Supported). In particular the ACCC design was evaluated for its resistance to corrosion and compared to the other designs. The study concludes that all three designs can develop galvanic corrosion under certain circumstances. While the results are not sufficient to make service life predictions of any of the tested conductors, they point out the necessity of thorough corrosion testing of all new conductor designs.

Recession Effects on Employee Retention

An economic recession affects the ability of organizations to retain employees. The downturn in the economy causes employers to evaluate how they conduct business causing lay-offs and unemployment rates to rise during periods of recession. A retention strategy is as important as sales and customer service during an economic recession. The impact of decisions made during the recession and the imminent labor shortage will impact the ability of organizations to retain their high performing employees. The author details the areas organizations must consider in a retention strategy and develops a retention model for her employer that can be used to assist with reducing turnover as the economy and the labor force begins to change.