If your products contain hard-chrome-plated hydraulic rods, pistons or spools, the second half of 2026 is the time to put this topic on the procurement agenda. The EU is moving hexavalent chromium (Cr(VI)) from REACH authorisation to restriction. The Socio-Economic Analysis Committee (SEAC) is expected to adopt its final opinion in November 2026, after which the Commission and Member States vote. This article summarises the regulatory status as of September 2026, the practical consequences for hydraulic supply chains, the trade-offs between five alternative coatings, and how to rewrite drawings so suppliers can quote all options at once.
1. What happened: from authorisation to restriction
For the past decade, using chromium trioxide for hard chrome plating inside the EU required a case-by-case authorisation from the Commission. That system broke down: applications piled up, each took well over a year to process, and in 2023 the Court of Justice annulled a large upstream authorisation (the Chemservice case). ECHA therefore switched to a restriction: instead of reviewing each applicant, it writes binding conditions into Annex XVII of REACH that apply to everyone.
| Date | Milestone |
|---|---|
| April 2025 | ECHA publishes the restriction proposal covering 13 Cr(VI) compounds |
| 18 Jun – 18 Dec 2025 | First public consultation, six months |
| March 2026 | RAC adopts its opinion; SEAC agrees its draft |
| 17 Jun – 17 Aug 2026 | 60-day consultation on the draft SEAC opinion |
| November 2026 (expected) | SEAC adopts its final opinion |
| End 2027 to early 2028 (Commission Q&A estimate) | Restriction enters into force, followed by a uniform 18-month transition period |
| 1 Jan 2029 | Review reports of all existing authorisations extended to this date to bridge into the new regime |
2. The key point: hard chrome is not banned, it is conditionally allowed
This is the most common misreading. ECHA's proposal splits Cr(VI) use into six categories; electroplating on metal substrates, which covers hard chrome on hydraulic rods, is one of them. The proposal does not prohibit this category. It requires plating shops to meet binding limit values in order to continue:
- Worker exposure: 5 µg/m³ as an 8-hour time-weighted average, 1 µg/m³ for some uses
- Site emissions: no more than 2.5 kg per year to air and 15 kg per year to water
- Monitoring and reporting: regular measurement and reporting to authorities
A stricter option (0.5 µg/m³, 0.25 kg and 1.5 kg) was also assessed, but ECHA itself concluded its cost was disproportionate to the benefit and did not recommend it. Decorative chrome faces a harder line: authorisations with review periods beyond July 2030 are cut back to that date, with volumes reduced by at least half compared with the application.
For buyers this means: hard chrome will still exist in the EU, but it will become more expensive, scarcer and more concentrated. Meeting the limits requires enclosed tanks, extraction and scrubbing, and continuous monitoring. For small plating shops that investment does not pay off, and a number will exit. Capacity consolidates among the survivors, and pricing power on lead time and cost shifts to the supply side.
3. Three procurement scenarios and what each requires
Scenario A: stay with hard chrome
- Ask your current plater for a written compliance roadmap: when they expect to meet the limit values and whether monitoring equipment is already in place.
- Qualify a second source. The 18 months after entry into force will be the tightest period for capacity.
- Standardise chrome thickness and post-grinding specifications so a future change of plater does not require requalification from scratch.
Scenario B: switch to an alternative coating
Qualifying an alternative coating typically takes 6 to 18 months, including laboratory tests, sample fitting and field endurance trials. Starting now is what makes the 2028 timeline achievable. The next section compares the options.
Scenario C: buy finished, already-coated parts
The restriction governs the use of Cr(VI) chemicals in processes inside the EU. A hydraulic rod hard-chrome plated outside the EU and then imported carries metallic chromium (chromium(0)) on its surface, not Cr(VI), and is not the target of this restriction. Two caveats apply. First, chromate passivation layers can contain residual Cr(VI), and automotive and electronic products must separately meet ELV and RoHS limits. Second, from a responsible-sourcing standpoint you should still ask the non-EU plater about its environmental compliance and require coating inspection reports plus a Cr(VI)-free declaration.
4. Five alternative coatings for rods, pistons and spools
| Coating | Surface hardness (approx.) | Corrosion resistance | Typical parts | Limitations |
|---|---|---|---|---|
| Hard chrome (current baseline) | HV 800–1000 | Medium, depends on thickness and micro-crack control | General-purpose rods | Cr(VI) process under restriction |
| HVOF tungsten carbide (WC-Co-Cr) | HV 1000–1200 | High | Offshore, mining, large cylinder rods | High equipment cost, uneconomic for small parts, requires post-grinding |
| Trivalent chrome plating | Slightly below conventional hard chrome | Medium | Thin wear layers | Thick-deposit processes still maturing, few suppliers |
| QPQ salt-bath nitrocarburising | HV 500–700 | High, several hundred hours in salt spray | Pistons, spools, small to medium rods | Slight dimensional change, no machining after treatment |
| Electroless nickel (Ni-P) | About HV 500 as plated, up to about 900 after heat treatment | High | Manifold bores, complex geometries | Limited thickness, wear resistance below hard chrome |
| Stainless or duplex rod, polished | Base material | High | Food, chemical, marine | Higher material cost, needs surface hardening for wear |
Figures are typical industry ranges; actual performance depends on process parameters and base material, so always test samples before committing. A practical rule of thumb: HVOF for large rods, QPQ for small and medium rods and pistons, electroless nickel for manifolds and complex bores.
5. How to write the drawing so suppliers can quote every option
Most drawings simply say "hard chrome 20 µm". That locks in the process and leaves the supplier no room to propose alternatives. Specify by function instead:
- Wear requirement: minimum surface hardness, or a specified wear test method
- Corrosion requirement: hours in neutral salt spray to ISO 9227
- Geometry and roughness: final dimensional tolerance and Ra after coating
- Base material and heat treatment: grade (with both JIS and DIN designations) and condition
- Process constraint: an explicit note "Cr(VI)-free process acceptable: yes / no"
- Documentation: coating inspection report, material certificate (EN 10204 3.1), Cr(VI)-free declaration
Written this way, a supplier can quote a hard-chrome version and an alternative-coating version side by side, giving procurement complete information.
6. Two other EU dates to watch in the same period
- New steel measures (Regulation (EU) 2026/1384): from 1 July 2026 a new tariff-rate quota regime replaces the old safeguard, with quotas roughly halved and a 50% out-of-quota duty; from 1 October 2026 imported steel must carry melt-and-pour evidence. The scope is currently limited to mill products; the Commission must assess by 30 June 2027 whether to extend it to downstream steel goods.
- CBAM: the definitive phase with financial obligations started on 1 January 2026, and the Commission has proposed extending the scope to about 180 downstream products from 2028. See our Compliance & Sustainability page.
7. How Weiyon can help
Weiyon Industry machines hydraulic rods, pistons, spools and manifolds in Taichung, Taiwan, in carbon, alloy, stainless and duplex steels, with one-stop delivery including surface treatment. Send us one drawing and we will quote both a hard-chrome version and an alternative-coating version, with EN 10204 3.1 material certificates and coating inspection reports. Quotes are returned within 1 to 2 business days.
For our process and material range see the capability statement; drawings can be uploaded directly via the online inquiry form. For background on coatings see our surface treatment selection guide.
This article summarises public regulatory information as of September 2026 and does not constitute legal advice. The final restriction text as published by ECHA and in the Official Journal of the EU prevails.
