GSO Metals provides hot black oxide finishing for carbon and alloy steel parts, supporting manufacturers with production-ready results. Black oxide is a conversion coating that improves corrosion resistance and appearance without altering part dimensions, making it ideal for tight-tolerance steel components. Our process delivers uniform appearance, improved corrosion resistance, and reliable repeatability for production parts.
Manufacturers rely on GSO Metals for hot black oxide finishing that fits directly into their production workflows—delivering consistent results without dimensional changes or unexpected delays.
By processing partswith GSO Metals, customers reduce shipping costs, shorten lead times, and eliminate uncertainty associated with large finishing vendors.
Customers return for repeat runs and ongoing production work, confirming the reliability of our process, finish consistency, and communication throughout each job.
Our operation is structured to support real production constraints, including scheduling, part handling, and clear acceptance expectations—so finishing doesn’t become a bottleneck.
GSO Metals is built to support manufacturers who need dependable black oxide finishing for steel parts. Our process is operational today and designed to integrate cleanly into real production workflows.
If you’re evaluating finishing partners or looking to bring black oxide work closer to home, we’re happy to review your parts, quantities, and timelines to confirm fit before running production.