This document provides corrosion protection solutions for fire apparatus frame, such as galvanizing, galvanizing with top coat, and polyurea coatings.
This service guide from the Fire Apparatus Manufacturers’ Association (FAMA) explains how to prevent and repair corrosion on fire apparatus frames. It covers galvanic corrosion, uniform and localized corrosion, and the effects of road chemicals like sodium chloride, magnesium chloride, and calcium chloride. The guide details protective measures such as galvanizing, polyurea coatings, and cleaning procedures. It also includes damage assessment methods and repair steps including sanding, blasting, priming, and applying undercoating or oil film barriers.
The guide is intended for technicians and service personnel who maintain fire apparatus, providing step-by-step instructions for evaluating frame damage, measuring corrosion loss, and applying appropriate protective coatings to extend the life of the vehicle’s frame.
Galvanic corrosion occurs when dissimilar metals are in contact with a fluid that allows electrons to transfer between them, causing the more active metal to corrode.
Calcium chloride pellets melt approximately twice as much ice as an equal amount of rock salt within the first 20 minutes after application.
The galvanizing kettle must be heated to a temperature ranging from 820-860 F (438- 460 C) to keep the zinc in a liquid state.