US antidumping review: China corrosion inhibitors dumping confirmed
The U.S. Department of Commerce preliminarily determined that Chinese producers of corrosion inhibitors sold subject merchandise below normal value during the March 2024–February 2025 review period, triggering antidumping duties. The agency is inviting public comment before issuing final results, which will affect importers and distributors of these chemicals from China.
Photo: Sergei Starostin / Pexels# US Antidumping Review: China Corrosion Inhibitors Dumping Confirmed
On June 4, 2026, the U.S. Department of Commerce announced preliminary results in its antidumping duty administrative review of certain corrosion inhibitors from the People's Republic of China. Commerce determined that subject producers and exporters made sales of corrosion inhibitors at less than normal value (NV) during the period of review (POR) spanning March 1, 2024, through February 28, 2025.
What Changed
This preliminary finding means that Chinese manufacturers of corrosion inhibitors have been selling these products to U.S. importers below fair value, injuring domestic U.S. producers. The determination triggers antidumping duties on affected merchandise. As Commerce states:
"The U.S. Department of Commerce (Commerce) preliminarily determines that producers/exporters subject to this review made sales of subject merchandise at less than normal value (NV) during the period of review (POR) March 1, 2024, through February 28, 2025."
Who Is Affected
Importers, distributors, and end-users of corrosion inhibitors sourced from China face increased landed costs through antidumping duties applied to entries made during the review period and beyond. The specific duty rates and affected exporters will be detailed in Commerce's final determination, expected within the standard administrative review timeline.
Corrosion inhibitors are chemical additives used to prevent oxidation and rust in industrial lubricants, cutting fluids, hydraulic systems, and protective coatings. Any U.S. importer purchasing these products from Chinese suppliers during this period should review their supplier's export status and the applicable duty assessment.
Comment Period and Next Steps
Interested parties—including importers, domestic producers, foreign exporters, and trade associations—are invited to submit comments on these preliminary results. The public comment period deadline and procedures are specified in the Federal Register notice. Commerce will consider all timely submissions before issuing final results, which typically occur 120 days after publication of preliminary results.
What this means for shippers
If you import corrosion inhibitors from China, contact your suppliers immediately to confirm their status in this antidumping review and request updated landed-cost quotes. File any comments with Commerce if you believe the preliminary determination is in error—the deadline is firm. Calculate the total antidumping duty exposure on your current China corrosion-inhibitor inventory and pending orders; failure to account for these duties will inflate your actual cost of goods sold and erode margins. /landed-cost
