Maintenance & Care Manual

Official maintenance protocols, tea-staining prevention, surface polishing guidelines, and ASTM A967 passivation care for architectural stainless steel.

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Get SANON's official printable maintenance guide including cleaning chemical checklists and warranty care requirements.

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Preventing Atmospheric Corrosion & Tea-Staining

While stainless steel is highly resistant to corrosion, airborne environmental contaminants and salt deposits can lead to surface discoloration (‘tea-staining’) if left uncleaned.

Routine Cleaning Schedule

Mild Environments (Indoor / Urban): Clean every 6 months using warm water, mild detergent, and a soft microfiber cloth.
Aggressive Environments (Coastal / Pool): Wash quarterly or monthly with fresh water to rinse away chloride salt deposits.

Restoration SOP for Light Discoloration

Apply specialized phosphoric acid-based stainless steel cleaners to dissolve surface oxide stains without scratching the underlying satin or mirror finish.

Frequently Asked Maintenance & Polishing Questions (FAQ)

How do you clean and prevent atmospheric tea-staining on outdoor stainless steel railings?
Tea-Staining & Discoloration Removal
Tea-staining is superficial discoloration caused by salt or environmental industrial deposits. Clean the surface using warm water with mild non-chloride detergent or specialized phosphoric acid cleaner, wiping strictly along the satin grain direction with a microfiber cloth, then rinse with fresh water.
What is the recommended maintenance cleaning frequency for Grade 304 vs Grade 316 railings?
Grade 304 vs 316 Cleaning Schedule
Grade 304 railings in mild indoor or urban environments require cleaning every 6 months. Marine-grade AISI 316 and Duplex 2205 systems installed near coastal salt spray or chlorinated pools should be rinsed with fresh water monthly or quarterly to maintain their passive chromium oxide layer.
Can steel wool or carbon steel wire brushes be used to scrub stubborn stains on stainless handrails?
Prohibited Abrasives & Iron Contamination Warning
Never use carbon steel wool or iron-contaminated tools. They embed free iron particles into the stainless steel surface, leading to severe localized rusting. Always use synthetic non-woven pads (e.g., Scotch-Brite) or soft microfiber towels.
How does chemical passivation (ASTM A967) protect railings from corrosion during maintenance?
ASTM A967 Passivation Barrier Protection
Chemical passivation removes microscopic free iron contamination left from machining and restores the ultra-thin passive chromium oxide (Cr2O3) barrier, ensuring maximum corrosion resistance in coastal and high-humidity installations.
What should I do if my stainless steel handrail develops superficial surface scratches?
Satin Surface Scratch Repair SOP
For Satin/Hairline finishes, lightly rub the scratched area with a fine synthetic abrasive pad (320-grit equivalent) strictly parallel to the original brush grain direction, then reapply a protective passivation spray.

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Maintenance Manual Index

Consult Material Engineer

Maintenance & Care Manual

Download Care Manual (PDF)

Preventing Atmospheric Corrosion & Tea-Staining

Routine Cleaning Schedule

Restoration SOP for Light Discoloration

Frequently Asked Maintenance & Polishing Questions (FAQ)

How do you clean and prevent atmospheric tea-staining on outdoor stainless steel railings?

What is the recommended maintenance cleaning frequency for Grade 304 vs Grade 316 railings?

Can steel wool or carbon steel wire brushes be used to scrub stubborn stains on stainless handrails?

How does chemical passivation (ASTM A967) protect railings from corrosion during maintenance?

What should I do if my stainless steel handrail develops superficial surface scratches?

Replacement Accessories & Marine Grade SKUs Matching This Guide

Maintenance Manual Index

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