Long-term Anti-oxidation Protection Solution For Bolt-type Tension Clamps In Power Transmission Projects

In outdoor power transmission and distribution environments, bolted type strain clamp is exposed to atmospheric salt spray and humid air for extended periods. Oxidation loss of the metal substrate leads to structural strength impairment. Improving the surface coating formulation can slow down the electrochemical reaction rate.

Hot-dip galvanizing process standard for bolt-type tension clamps

Hot-dip galvanizing is a basic protective measure. The process involves pickling, immersion in molten zinc, and centrifugal drying. The zinc layer thickness is maintained above 80 micrometers. The fit accuracy between the bolt and the base material must be checked by gauges after heat treatment. A uniform zinc coating forms a physical barrier.

Microscopic control of coating thickness and uniformity

Thickness fluctuations directly affect the service life of metal fittings. Electromagnetic induction thickness gauges are used to sample the surface of bolt-type tension clamps at multiple points. Trace amounts of aluminum are added to the zinc bath to improve fluidity. The coating microstructure consists of a pure zinc layer and an iron-zinc alloy layer. This multi-layered structure provides sacrificial anodic protection. Reduced microporosity inhibits the penetration path of corrosive media.

Film-forming characteristics of composite anti-corrosion coatings on bolt-type tension clamps

For heavily polluted industrial areas, silicone anti-corrosion paint or zinc-rich primer is used as an adjunct. The coating fluidity improved the coverage integrity at the thread grooves of dead end strain clamp. The spraying pressure is kept constant. This composite coating isolates the penetration of moisture and oxygen. Regular inspections to observe film cracking are a key maintenance focus. The balance between coating hardness and toughness reduces the probability of mechanical scratches during construction. Nanoscale fillers create a labyrinth effect in the dry film.

Anodizing treatment of aluminum alloy bolt-type tension clamps

Anodizing is typically chosen for aluminum alloy substrates. A dense oxide film is formed on the metal surface through electrolysis. The electrolyte temperature is kept constant at 20 degrees Celsius. The oxide film layer has extremely high resistivity. The chemical stability of the bolted dead end clamp clamp is improved in acidic rainwater environments. Sealing treatment fills the pores of the oxide film. This method reduces the risk of galvanic corrosion caused by dissimilar metal contact.