BONDERITE M-AD 131 Zinc Phosphate Accelerator is a colorless to slightly yellow liquid additive developed for controlling accelerator levels in industrial zinc phosphate pretreatment baths. Also known as ACCELERATOR 131, it increases nitrite accelerator concentration so phosphating systems can maintain stable conversion-coating performance during metal processing. The product suits spray and immersion lines before painting or further manufacturing.

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BONDERITE M-AD 131 Zinc Phosphate Accelerator Benefits

BONDERITE M-AD 131 Zinc Phosphate Accelerator helps plant operators maintain the required accelerator balance in zinc phosphate baths. Accelerator concentration can decline during production and idle periods. Controlled additions allow operators to correct the bath without replacing the complete working solution, helping reduce downtime, chemical waste, and process variation.

The liquid format supports convenient addition and rapid distribution in circulating baths. It integrates into established multi-stage lines that may include cleaning, rinsing, activation, phosphating, passivation, and final rinsing. Consistent bath control can support uniform coating formation and reliable downstream paint adhesion.

Applications for BONDERITE M-AD 131 Zinc Phosphate Accelerator

This additive is used in zinc phosphate conversion-coating processes for steel and other approved metal substrates. Typical production environments include automotive components, appliances, industrial equipment, fabricated metal parts, machinery, and general metal finishing. It can be used in spray, immersion, or combined systems when specified by the applicable BONDERITE process documentation.

The product is not a stand-alone cleaner, coating, or adhesive. It functions as a bath-control additive within a correctly designed zinc phosphating process. Final results depend on cleaning efficiency, surface condition, bath composition, operating temperature, contact time, spray pressure, agitation, rinse quality, line loading, and analytical control. Users should follow the process sheet for the main phosphating product rather than applying a universal dosage.

Process Control with BONDERITE M-AD 131 Zinc Phosphate Accelerator

Routine bath testing is essential before any addition. Operators should measure the accelerator level using the approved Henkel analytical procedure and compare the result with the operating range specified for the phosphating bath. Add only the calculated quantity, allow thorough circulation, and retest before processing production parts. Small corrective additions are easier to control than one large addition.

Bath records should include test results, product additions, production throughput, operating temperature, line stoppages, and visible coating changes. This documentation helps process engineers identify consumption patterns, plan chemical replenishment, and maintain consistent surface quality. Automated dosing may be considered for high-volume lines after validation with Henkel technical support.

How to Use BONDERITE M-AD 131 Zinc Phosphate Accelerator

Confirm that the pretreatment bath, analytical method, and target accelerator range are compatible with this additive. Ensure circulation or agitation is operating, then introduce the required amount gradually at the designated addition point. Avoid adding concentrated product directly onto workpieces or into a stagnant area of the tank. Mix thoroughly and verify the bath value before restarting production.

Use suitable chemical-resistant personal protective equipment and follow the current Safety Data Sheet, plant procedures, and local regulations. Keep the container closed when not in use and store it away from incompatible substances. Never mix the product with unrelated treatment chemicals unless the process documentation authorizes the combination.

Why Buy BONDERITE M-AD 131 Zinc Phosphate Accelerator?

BONDERITE M-AD 131 Zinc Phosphate Accelerator gives metal-finishing operations a focused solution for maintaining nitrite accelerator levels in zinc phosphate baths. Its liquid form, compatibility with spray and immersion systems, and role in controlled multi-stage pretreatment make it valuable for manufacturers seeking stable conversion-coating quality, efficient bath maintenance, and dependable preparation before painting.

Review the official Henkel BONDERITE M-AD 131 product information and request the latest regional Technical Data Sheet and Safety Data Sheet before use. Explore our metal pretreatment additives for additional bath-control and conversion-coating solutions.