Tecnoseal TEC-BNT Bennett Trim Tab Anode - Zinc - Pair

The Tecnoseal TEC-BNT Bennett Trim Tab Anode – Zinc – Pair is a marine-grade cathodic protection system engineered for Bennett trim tab assemblies found on mid-range to larger recreational and commercial vessels. Trim tabs are critical control surfaces that manage pitch and trim during high-speed operation, and they're exposed constantly to saltwater corrosion. This zinc anode pair sacrifices itself electrochemically to shield the underlying aluminum or steel trim tab hardware from galvanic corrosion, extending component lifespan and preventing catastrophic structural failure in harsh marine environments.

Zinc anodes work by establishing a galvanic cell where zinc—being more electronegative than aluminum or steel—corrodes preferentially, leaving the trim tab assembly intact. Each anode in this pair measures 3.76 inches in length with a 1.12-inch width and 0.55-inch height, proportioned to match Bennett trim tab geometry and maximize surface contact for efficient electron transfer. The individual weight of 0.47 lbs per anode ensures adequate mass for sustained corrosion protection across multiple boating seasons, particularly in brackish or saltwater conditions where galvanic attack accelerates rapidly. Tecnoseal's manufacturing expertise guarantees consistent zinc purity and uniform current distribution, critical factors that directly impact protection efficacy and replacement intervals.

Vessel operators and marine maintenance technicians should inspect trim tab anodes annually—or more frequently in high-salinity or warm-water environments—and replace when consumption reaches 50 percent of original mass. This paired anode set fits Bennett trim tab systems commonly found on center consoles, sport fishers, and cruising yachts between 25 and 50 feet. Installation is straightforward: anodes bolt directly to existing Bennett trim tab mounting brackets using corrosion-resistant fasteners, requiring no modifications to the trim tab actuator or electrical systems. Keep spares aboard for extended cruises; preventive anode replacement costs far less than repairing corroded trim tab rams or seals.