Evaluation of Al-Zn-In Alloy for Galvanic Cathodic Protection of Bridge Decks

摘要

The objective of project NCHRP-100A was to develop a galvanic mesh anode for bridge deck application. The concept was to develop an expanded mesh or perforated sheet that would last at least 25 years, be durable for construction, not interfere with concrete overlay bonding and be of a size that is practical for transportation and field installation. This work was planned in two stages. Stage 1 was to develop the anode mesh. Stage 2 was to install the anode on two bridge decks of 1,000 to 2,000 square feet surface area to evaluate the anode performance and to produce concrete test blocks for anode evaluation in the laboratory and calculate anode consumption rate. The evaluation period for the bridges and test blocks was to be twelve months.