Materials· 2026Q2
Zn-Based Coatings and Durability of High-Strength Pearlitic Bridge Wires: A Critical Evidence Appraisal
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- Q2SCImago
- 2026year
Short summary
Zn-based coatings delay corrosion, but local steel condition and loading are key to bridge wire mechanical response, with a 100 μm cut reducing mean fatigue life by 58% in saline spray vs. air.
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Key points
- Zn-based coatings delay visible corrosion, but their effectiveness varies based on when red/brown rust appears.
- A 100 μm deep cut in bridge wires reduced mean fatigue life by 58% (203,498 cycles in air vs. 85,538 in saline spray at 360 MPa stress range).
- Hydrogen-sensitive mechanical responses were confirmed in pearlitic wires, with selective desorption distinguishing retained hydrogen populations.
- Continued wetting and local contact conditions significantly impact wire durability, alongside spatial exposure and load-transfer information.
AI-generated from the title and abstract; the full text is not read.
Abstract
Zn-based coatings delay corrosion, while local steel condition and loading determine the mechanical response of bridge wires. This critical evidence appraisal uses 61 selected study families to clarify what coating, hydrogen and fracture measurements establish. Tested products differ in when visible red rust or brown products appear. After steel exposure, fatigue tests assess a different response: with a prescribed 100 μm deep cut, mean life at a stress range of 360 MPa was 203,498 cycles in air and 85,538 cycles in 3.5% NaCl spray. Controlled charging and desorption establish hydrogen-sensitive mechanical responses in the tested pearlitic states; selective desorption distinguishes the mechanical relevance of retained populations. Matched pre-corrosion comparisons and contact tests show why continued wetting and local contact conditions matter. These comparisons guide evidence selection for the observed wire state and response being assessed. The synthesis is interpretive; cable assessment also requires spatial exposure, restraint and load-transfer information, with validation matched to the intended mechanical output.
The authors' abstract, as published at the source. Materials, 2026 · DOI ↗
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Field: Metals and Alloys
Metals and AlloysMaterials Science