US anti-subsidy review on Chinese corrosion inhibitors: preliminary findings
The U.S. Department of Commerce has issued preliminary results in its countervailing duty investigation of corrosion inhibitors imported from China for the 2024 review period (Jan. 1–Dec. 31, 2024). Commerce preliminarily determined that countervailable subsidies were provided to Chinese producers and exporters. The agency has also rescinded the review for five companies. Interested parties may submit comments on these preliminary findings.
Photo: 정규송 Nui MALAMA / Pexels# US Anti-Subsidy Review on Chinese Corrosion Inhibitors
On May 26, 2026, the U.S. Department of Commerce released preliminary results in its countervailing duty administrative review of corrosion inhibitors from the People's Republic of China. The investigation covers the period January 1, 2024, through December 31, 2024.
Preliminary Subsidy Findings
Commerce preliminarily determined that "countervailable subsidies were provided to producers/exporters of corrosion inhibitors from the People's Republic of China." While the preliminary results do not specify individual subsidy rates at this stage, the findings indicate that Chinese manufacturers of corrosion inhibitors benefited from government support that violates World Trade Organization subsidy rules.
Company-Specific Actions
As part of these preliminary results, Commerce rescinded the review with respect to five companies. Rescission typically occurs when a respondent company fails to cooperate adequately with the investigation or when Commerce determines there is no basis to continue examining that particular exporter.
Next Steps and Comment Period
Commerce has invited interested parties—including U.S. producers, importers, foreign manufacturers, and trade associations—to file comments on the preliminary results. These comments will inform Commerce's final determination, which is expected within a defined statutory timeframe. The final results will establish the applicable countervailing duty rates for corrosion-inhibitor imports from China, either on a company-specific or country-wide basis.
Countervailing duty orders impose additional duties on imported merchandise to offset the effect of foreign government subsidies, protecting domestic producers from unfairly subsidized competition.
What this means for shippers
If you import corrosion inhibitors from China, monitor the final determination carefully—it will set binding duty rates effective immediately. Request updated HS classification and duty estimates now for any current or planned shipments; the final order may increase landed costs significantly. Verify your supplier's company name against the final list of subject producers to confirm whether a higher, lower, or no additional duty applies. File any factual corrections or mitigation arguments with Commerce before the comment deadline closes.
