Stainless Steel Cable Ties Breakage Originates From Pitting And Crevice Corrosion.
The Impact of Pitting Corrosion on the Durability of Stainless Steel Cable Ties
In practical use, when starter wall ties is exposed to humid or chlorine-containing environments, tiny corrosion pits easily form on the surface. These pits locally weaken the metal thickness of ss wire ties, leading to a decrease in the material's tensile strength over long-term exposure. These tiny notches become stress concentration points, increasing the likelihood of crack propagation.
Creak Corrosion and Fracture Mode
Creak corrosion often occurs at the lap or fastening points of ss tie wraps. Insufficient oxygen supply in the confined space creates a localized corrosive environment. Metal ions gradually dissolve, and corrosion products accumulate, causing a sharp increase in local stress, ultimately leading to fracture.
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Corrosion Rate Difference: The corrosion rate within the crevice is significantly faster than on the exposed surface, forming a localized weak point.
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Crack Initiation Location: Fractures typically begin at the edge of the crevice and propagate along the corrosion path.
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Environmental Factors: Chloride-containing or acidic media accelerate crack propagation and shorten the service life of stainless steel cable ties.
The fracture problem of metal ty wraps is not only related to the surface quality of the material but also closely linked to the long-term operating environment. Pitting and crevice corrosion work together to form localized fatigue sources, causing microcracks to propagate along the stress concentration direction. Attention to construction and maintenance processes can reveal the fracture formation mechanism to some extent.
