EOS NickelAlloy C22: Strength You Can Trust To Fight Back Corrosion
NOVEMber 03, 2025 | Reading time: 4 min
Corrosion is one of engineering’s most familiar enemies — and one of its most expensive.
It creeps unseen through pipelines, tanks, and housings. It pits metal in offshore platforms, stains sterile production lines, and quietly weakens precision components that were never meant to fail. Across industries, it costs the global economy more than $2.5 trillion each year.
That is where EOS NickelAlloy C22 comes in— a nickel-chromium-molybdenum alloy built to thrive where corrosion fights back the most. Designed for additive manufacturing (AM), EOS NickelAlloy C22 brings together high strength, exceptional toughness, and unmatched resistance to pitting, crevice corrosion, and stress corrosion cracking.
From aerospace to chemical processing and marine engineering, this is a material engineered to perform in demanding environments.
The Science Behind the Shield
EOS NickelAlloy C22 is defined by chemistry, but also by purpose.
Its balanced mix of nickel, chromium, and molybdenum lets engineers resist the environment’s relentless forces even in oxidizing and reducing conditions. Where other materials begin to degrade, C22 holds fast.
This stability makes it ideal for equipment exposed to aggressive acids, seawater, or sterilizing agents — environments where failure is measured not in years, but sometimes in weeks. By leveraging the proven properties of ASTM B574 / UNS N06022 in an EOS-qualified additive form, engineers can now design corrosion-resistant geometries that were once impossible to machine or weld.
Aggressive Chemistries: Chemical and Analytical Environments
In chemical processing, metals face constant punishment — temperature swings, concentrated acids, and oxidizing gases that attack micro-imperfections. Valves, heat exchangers, and pump components can suffer pitting or crevice corrosion that leads to leaks, contamination, and costly shutdowns.
C22 resists localized corrosion mechanisms, extending component life and preserving the purity of chemical reactions. Its combination of strength and ductility enables thinner walls, lighter designs, and complex flow-optimized shapes — achievable only through AM.
The result: higher process reliability, lower maintenance, and materials that meet the demands of modern sustainability standards.
Sterile Yet Stressful: Chemical Industry and Food Processing
In sterile manufacturing, cleanliness is non-negotiable — but so is chemical resistance.
Cleaning-in-place (CIP) systems rely on harsh agents like chlorides and peroxides that rapidly corrode traditional alloys. Every surface, weld, and cavity becomes a potential site for bacterial growth or contamination.
EOS NickelAlloy C22 offers a smooth, corrosion-resistant surface that maintains hygienic integrity after repeated sterilization cycles. Its biocompatibility and resistance to oxidizing acids make it ideal for mixers, reactors, and filtration components where product purity and mechanical performance intersect.
With AM, manufacturers can integrate conformal channels and seamless transitions that eliminate crevices — minimizing cleaning downtime and ensuring long-term reliability.
Salt, Steam, and Atmosphere: Marine and Other Industries
Few environments are as unforgiving as the ocean or the upper atmosphere.
Marine engineers battle saltwater corrosion daily; even high-grade stainless steels succumb to crevice attack in stagnant seawater. EOS NickelAlloy C22’s ability to resist both oxidizing and reducing conditions makes it a strong candidate for offshore platforms, subsea connectors, and seawater handling systems that must survive for decades.
In other industries, C22 fills a different niche. It isn’t a high-temperature superalloy — it’s a corrosion-proof workhorse for fluid handling systems and structural components exposed to fuels, de-icing agents, and aggressive atmospheres. Where integrity matters more than heat resistance, C22 ensures long-term stability without adding unnecessary weight or complexity.
Across these environments — from deep sea to stratosphere — the same chemistry applies. C22 doesn’t just resist corrosion; it refuses to let corrosion define the limits of design.
The Additive Advantage
Corrosion resistance is only half the story. AM transforms what engineers can do with materials like EOS NickelAlloy C22.
With EOS systems, parts can be topology-optimized for strength and flow, lightweighted for efficiency, and consolidated to reduce joints and potential failure points. Internal channels can be printed directly into structures, enabling cooling, venting, or flow control that traditional manufacturing can’t replicate.
Every layer is built from EOS-certified powder with strict quality control, ensuring consistent density, mechanical performance, and surface quality. For engineers, that means the power to move beyond simple corrosion resistance toward true design resilience.
A New Standard for Corrosion Resistance in AM
EOS NickelAlloy C22 expands the company’s metal portfolio with a premium, corrosion-resistant solution for the world’s harshest conditions. Whether in chemical reactors, pharmaceutical tanks, aerospace assemblies, or marine platforms, it delivers the combination of strength, reliability, and manufacturability that modern industries demand.
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