RFQ ( Corrosive Atmospheres
Corrosive Atmospheres 
Cable ties and their associated fixing devices are generally suitable for use in wet and dry locations and also where subject to exposure to common corrosive elements. While concerns for deterioration resulting from atmospheric corrosion immediately lead one to think of metallic products, some corrosive elements in certain application environments can have equally deteriorating affects on nonmetallic materials. NEMA cable tie Application Bulletin No. 2 addresses the affects of ultra-violet light exposure. Some other types of corrosive environments include: any wet or damp application area; salt laden air as is common in coastal areas; areas known for acid rain; harsh industrial environments; and even areas that are subject to radiation exposure.
Cable tie products are available in constructions that consist of all metallic materials, composite (combination of metallic and nonmetallic materials), and all nonmetallic materials. Cable ties constructed of the most common nonmetallic materials are generally immune to corrosive affects from exposure to water and moist sodium and sulfur laden atmospheres and are resistant to the affects of many other airborne contaminants. The table below provides guidance on selecting cable tie products constructed from specialized polymer materials where resistance to particular chemicals is a concern.
Products constructed entirely from metallic materials are typically specified where the application places a high reliance on mechanical strength, even when subject to the potential for physical abuse. The National Electrical Code®, NFPA 70, requires all metallic products used in an electrical system to have a degree of resistance to corrosion. Product standards for cable ties include mechanical tests for metallic and composite cable ties and fixing devices both before and after exposure to salt spray. Metallic cable ties as well as metallic components of composite cable ties are most often constructed from stainless steel. Stainless steel grades that contain at least 16% chromium, such as 306, 310 and 316, are generally considered to provide the required minimum degree of resistance to atmospheric corrosion.
The manufacturer should always be consulted if there is a question about the proper application of a cable tie or associated fixing device.
NEMA members provide high value, consistent quality, safe and efficient use for cable ties and their associated fixing devices that meet the expectations of a wide variety of users. Visit us at NEMA Information for Cable Ties for current information on our industry and for the names of NEMA member cable tie manufacturers.
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