Waste disposal and regulations for black oxide

Waste processing and regulations for chemical blacks in the Netherlands

The chemical blackening of metal produces residual liquids and rinse water that are not allowed to go down the sink. Clear rules apply to both individuals and companies for the disposal of these types of substances. Read more about Waste processing and regulations for chemical blacks in the Netherlands below.

What is not allowed just like that?

Residual liquids or rinse water from black oxide baths may not be discharged through the sewer system without permission. Most liquids fall under chemical waste. Always check what is allowed in your situation, especially if you are a company or self-employed.

Advice per product or waste stream

Waste stream	Examples at Verzinkshop	Things to do in the Netherlands
Black Oxide Baths	Black Oxide, Black Oxide Ultra, Black Stainless Steel Oxide	Not through the sewer. Private individuals: take it to the recycling center as small chemical waste. Companies: use a recognised waste collector or apply for a discharge permit via the Environment Desk.
Rinse water after blackening	All rinsing steps after the above baths	Treat as chemical waste unless you are sure that discharge is allowed. When in doubt, always collect and hand it in to RCA or waste processor.
Metal Activator	Galvanizing Metal Activator	Do not discharge. Private individuals: hand in at the recycling center. Companies: dispose of via an approved collector or according to notification/permit.
Sealers	DeepSeal Sealer, Acrylic Sealer	Do not mix residual liquid or rinse water with sewage. Take away as chemical waste. Companies: collection via an approved processor.

Tips to limit waste

• Work with small amounts at a time
• Use containers for rinse water
• Use a double sink setup (two sinks in a row) to save water
• Keep acidic, alkaline and metallic liquids separate
• Write down what you have disposed of and through whom, this is useful for companies

What should you do as a company or self-employed person?

• Do the permit check via the Environment Desk: www.omgevingsloket.nl
• Read the discharge rules on the IPLO: www.iplo.nl
• If in doubt, contact your municipality or water board

What should you do as a private individual?

• Hand in everything at the recycling center as small chemical waste
• Never throw flush water or baths into sinks, toilets, or cisterns.

For customers outside the Netherlands

Regulations vary from country to country. Always check local environmental regulations before disposing of chemicals.

Disclaimer

This information is intended as general advice for users of Verzinkshop products in the Netherlands. Verzinkshop is not a waste processor or legal advisor. The user is always responsible for the correct disposal of chemicals and compliance with local laws. Different rules may apply to other countries.