Abstract: In coastal and heavy industry pollution environment，the hot-dip galvanizing anti-corrosion technology can no longer meet service life requirements of transmission tower steel components.Hot-dip galvanized Zn -Al and its multiple alloying coating could prolong service life more than 1 time，without a higher cost.Thermal spraying zinc and zinc -aluminum alloy coating show better corrosion resistance，extending the service life 1 -8 times.Life -cycle cost -effective assessment is 2.4 times than that of hot-dip galvanizing.Thermal spraying zinc alloy to replace the traditional galvanized is the development direction to achieve long-term anti-corrosion tower steel components.
Key words: transmission tower; corrosion protection；arc spraying
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