Just as knowing the load capacities of your metal hardware is crucial to the longevity and structural integrity of your building project, so is understanding the potential for corrosion. The likelihood of rust and rot increases when building outdoors in wet environments and other corrosive conditions. Having a solid awareness of the corrosive threats posed by the environment and your building materials will help you to choose the fasteners, connectors and anchors that will best mitigate corrosion risk and keep your project structurally sound for the long haul.
Start by evaluating the exposure levels in your environment. Is it an interior dry- or exterior wet-service job, for example? Generally, outdoor environments are more corrosive to steel because of the elevated moisture levels relative to interior spaces. Projects near the ocean or waterfront are at increased risk for corrosion due to airborne chlorides and salt splash prevalent in marine locales. Salt is also a danger if building materials will be exposed to de-icing salts.
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