NASA Pauses Lunar Gateway After Corrosion Discovered in Key Modules

During testimony before the U.S. House Committee on Science, Space, and Technology on 22 April 2026, NASA Administrator Jared Isaacman announced that the two habitable volumes delivered for the Lunar Gateway—HALO and the International Habitation Module (I-HAB)—showed corrosion. He warned the issue would push the station’s operational date beyond 2030 and that NASA was pausing the program to focus on a lunar-surface base.

Ars TechnicaESA Sheds Light on NASA Administrator’s Claims on Gateway Modules

NASA promoted the Gateway for a decade as an orbiting platform for lunar exploration and deep-space testing. The first component was slated for launch in 2022, HALO for 2024, and I-HAB for 2026. Schedule slips led to a March 2026 announcement pausing the experiment in favor of lunar-surface activities.

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• 2022: First component launch target.

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• 2024: HALO launch target.

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• 2026: I-HAB launch target.

ESA Sheds Light on NASA Administrator’s Claims on Gateway Modules

• Apr 2025: HALO delivered; corrosion found.

ESA Sheds Light on NASA Administrator’s Claims on Gateway Modules

• 22 Apr 2026: Congressional testimony.

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• Mar 2026: NASA pauses Gateway.

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Isaacman said, “The only two habitable volumes that were delivered both were corroded,” warning of delays past 2030. ESA confirmed HALO’s corrosion on delivery and launched a “comprehensive investigation” into forging, surface-treatment, and material-property factors. ESA noted I-HAB shows a “similar but less severe issue,” is unshipped and “technically manageable.” NASA said it is exploring repurposing the modules for a lunar base.

ESA Sheds Light on NASA Administrator’s Claims on Gateway Modules

Rep. Suhas Subramanyam (D-VA) asked, “Do you know what will happen to that large investment that was made?” highlighting the impact on Northrop Grumman, a major employer in his district, and voicing concern over financial losses from the suspension.

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Isaacman said both HALO and I-HAB were corroded; ESA clarified I-HAB’s corrosion is less severe, unshipped, and manageable. Remediation timelines and I-HAB’s eventual integration remain unspecified.

ESA Sheds Light on NASA Administrator’s Claims on Gateway Modules

• “The only two habitable volumes that were delivered both were corroded.” — Jared Isaacman, NASA Administrator

ESA Sheds Light on NASA Administrator’s Claims on Gateway Modules

• “Following the identification of corrosion on HALO, a comprehensive investigation was promptly initiated,” — ESA spokesperson

ESA Sheds Light on NASA Administrator’s Claims on Gateway Modules

• “Preliminary findings indicate that the issue likely results from a combination of factors, including aspects of the forging process, surface treatment, and material properties.” — ESA spokesperson

ESA Sheds Light on NASA Administrator’s Claims on Gateway Modules

• “You’ve also canceled an order for the Habitation and Logistics Outpost,” — Rep. Suhas Subramanyam, D-Virginia

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NASA will assess adapting HALO for lunar-surface use while continuing corrosion remediation. ESA will keep its “tiger team” on I-HAB to resolve the issue before integration. The program now extends beyond 2030, with the final fate of the modules pending further technical and budgetary review.

ESA Sheds Light on NASA Administrator’s Claims on Gateway Modules