Stellar Solutions CitriSurf 77 citric acid stainless steel passivation cleaner — 22 oz spray, NSF-registered corrosion protection

CitriSurf 77 is a commercial-grade citric acid cleaner and passivation spray that removes free iron and helps create an inert, corrosion-resistant surface on stainless steel and other metals.

Designed for industrial and household environments, CitriSurf 77 (22 oz) combines citric acid with proprietary ingredients to eliminate microscopic iron contamination that promotes rust. The ready-to-use trigger bottle treats up to about 90 square feet and meets ASTM and AMS passivation standards when used as directed. NSF registration makes it acceptable for use in and around food processing areas where contact is incidental, so it’s suitable for kitchens, restaurants, medical facilities, marine hardware and manufacturing equipment.

How does CitriSurf 77 protect metal surfaces?

Instead of simply masking rust, CitriSurf 77 targets the free iron particles that initiate corrosion. By removing those contaminants and encouraging a passive oxide layer, treated surfaces are less chemically reactive and more resistant to future discoloration.

• Removes surface-embedded iron and mill scale that trigger corrosion.
• Promotes formation of a passive oxide layer on stainless steel.
• Reduces the chemical reactivity that leads to pitting and staining.

What surfaces and settings is it safe for?

CitriSurf 77 is formulated for stainless steel but works on bronze, brass, chrome and aluminum as well. It’s widely used in food service, medical, marine, aerospace and military settings because it meets common industry standards when applied per instructions.

• Suitable for kitchen appliances, commercial equipment and food-contact adjacent areas.
• Used in maintenance for boats, grills, range hoods, and refrigeration units.
• Complies with ASTM A967, A380, B600 and AMS 2700 when used correctly.

How do you apply CitriSurf 77 for best results?

The trigger sprayer enables targeted, low-mess application; surface must be clean and free of loose debris first. Follow the label directions for dwell time, then rinse or wipe according to the instructions to complete the passivation process.

• Clean surface of oils and loose dirt before spraying.
• Apply evenly, allow recommended dwell time, then rinse or wipe off as directed.
• One 22 oz bottle treats up to ~90 sq ft depending on application method.

Are there any safety or compliance considerations?

CitriSurf 77 uses relatively low-hazard chemistry compared with stronger acids, but users should still follow safety guidance on the label. It is NSF-registered for appropriate food-area use and is made in the USA to recognized industry standards—always use personal protective equipment when handling concentrated cleaning agents.

• NSF-registered for use in and around food processing areas where not intended for inclusion in food.
• Meets ASTM and AMS passivation standards when used as directed.
• Wear gloves and eye protection; follow label instructions for disposal and ventilation.

Who is this product for? CitriSurf 77 is aimed at maintenance teams, facilities managers and homeowners who need a professional-strength passivation solution that’s simple to use. If you maintain stainless steel in commercial kitchens, marine environments, medical equipment, or high-end appliances and want to prevent rust, discoloration and premature wear, this ready-to-use spray offers a proven, standards-compliant option for keeping metal surfaces performing and looking their best.