In the past, projects near the coast or in chemical plants typically relied on 316 woven mesh or 304 expanded metal mesh. After just two or three years, the issues become apparent: woven mesh tends to trap water and salt at the intersections, leading to rapid corrosion at the joints. As for 304 stainless steel, while it might save a little money upfront, it quickly develops red rust spots when exposed to heavy salt spray or acidic/alkaline environments; eventually, it has to be dismantled and replaced-a process where labor costs far exceed the price of the material itself.
This is precisely why, in recent years, specifications for chemical plant walkways, offshore platform safety barriers, and high-end architectural facades increasingly mandate 316 stainless steel expanded metal mesh.
In short, it solves two of the most troublesome issues:
First, it eliminates rust at weld points and crevices. Expanded metal mesh is created by machine-cutting and stretching a single sheet of metal; it has no weld points and no overlapping "dead zones" like those found in woven mesh. Furthermore, the 316 alloy contains molybdenum, which specifically combats corrosion from seawater salt spray and acidic or alkaline substances, making it exceptionally durable in harsh environments.
Second, it offers superior strength and cost-efficiency regarding material usage. Perforated metal involves punching holes in a sheet and discarding the scrap-meaning you pay for waste material. In contrast, expanded metal is formed by stretching, resulting in virtually zero waste. Additionally, the diamond-shaped mesh provides excellent slip resistance for walkways and maintains load-bearing capacity comparable to the original solid sheet.
Whether for walkway decking, filtration and screening, or architectural sun-shading facades, opting for 316 expanded metal mesh right from the start-especially in challenging environments-saves a great deal of hassle regarding long-term maintenance.