Zeller Inhibitor 6510 10 L, highly alkaline additive for metalworking emulsions, pH adjustment of amine-free coolants, potassium-hydroxide-based concentrate

Zeller Inhibitor 6510 is a highly alkaline process additive designed for adjusting the pH of metalworking emulsions, especially in amine-free systems. It allows precise pH correction of working baths and helps maintain stable chemical parameters of metalworking fluids. The product is supplied in a 10 L canister, which is well suited for industrial plants and workshops with higher coolant consumption.

Advantages and unique features

• Strongly alkaline product – working solution pH around 14, effective even at low addition rates.
• Intended for pH control in metalworking emulsions that comply with TRGS 611 requirements, particularly in amine-free systems.
• Process concentrate – an addition of about 0.05 % can increase the bath pH by approx. 0.5 units (depending on the system).
• Clear, colourless liquid, easy to handle, dose and measure.
• High consistency of performance – stable physico-chemical properties make process control easier.
• Labelling and documentation fully compliant with current CLP and REACH regulations.

Properties and applications

• pH adjustment of emulsions: used as a corrective additive to raise the pH of metalworking baths when their alkalinity decreases during use.
• Amine-free systems: particularly recommended for TRGS 611 compliant coolants where amines are not used in the formulation.
• Maintenance of working fluids: supports keeping the bath in the recommended alkaline pH range, in line with the coolant supplier’s guidelines.
• Metalworking industry: suitable for machining centres, grinding shops and other installations where tight control of coolant parameters is required.
• Accurate dosing: the known density and high alkalinity make it easy to calculate the required amount of additive based on pH measurements.

Technical data

Storage recommendations

Store Inhibitor 6510 in tightly closed, clearly labelled containers in a cool, well-ventilated area, away from heat sources, frost and direct sunlight. The product is highly corrosive, so containers must be protected from damage and kept out of reach of unauthorised persons. Prevent any release of the concentrate into drains or the aquatic environment.

FAQ

What is Zeller Inhibitor 6510 used for?
It is a highly alkaline process additive used to adjust and increase the pH of metalworking emulsions, especially in amine-free systems.

How should Inhibitor 6510 be dosed?
In practice, even a small addition of concentrate (on the order of a few tenths of a per mille) can noticeably raise the bath pH; the manufacturer indicates that an addition of about 0.05 % may increase pH by around 0.5 units. Exact dosing must always be determined from pH measurements in the specific system and the coolant supplier’s recommendations.

Does the product contain amines?
No, Inhibitor 6510 is an amine-free additive designed, among other things, for systems where amines are not permitted.

What personal protective equipment is required when handling this product?
Because of its strongly corrosive properties, chemical-resistant gloves, protective clothing and eye and face protection must be used. Where splashes or aerosols may occur, safety goggles or a face shield and suitable respiratory protection are recommended.

Is Inhibitor 6510 classified as dangerous goods for transport?
Yes, it is classified as UN 1814 – potassium hydroxide solution, hazard class 8, packing group II. ADR/IMDG/IATA regulations must be observed during transport.