What To Do If Hinge Are Rusted

"Why Won't My Cabinet Door Close Properly Anymore?"

Many homeowners have encountered this frustrating issue - only to discover upon closer inspection that the hinges have developed rust. Rusty hinges not only look unsightly but can also cause sticking, squeaking, and even complete failure of the cabinet door. So how can you tell if it's real rust or just surface staining? And what's the best way to handle and prevent it?  

1. False Rust: Can Be Fully Restored with Prompt Treatment

False rust typically appears as stains or small spots on the hinge surface, resembling rust but actually just dirt buildup or early-stage oxidation. This commonly occurs about a year after furniture installation and, if addressed promptly, won't cause lasting damage.  

Treatment Method:  

•  Wipe firmly with a clean dry cloth or damp cloth (important: do not use dish soap, as it may accelerate corrosion).  

•  For stubborn spots, lightly dab with water or a neutral cleaner, then immediately dry with a clean cloth.

   

2. True Rust: Surface Corrosion Requires Targeted Action

If the rust remains after wiping or becomes more noticeable, it's likely true rust.  

How to Identify:  

Gently scrape the rust spot with a key or screwdriver:  

• False rust: Stains wipe away, metal surface remains smooth.  

• True rust: Rust persists after scraping, and the metal shows pitting or roughness.  

Solutions for True Rust:  

Minor rust: Lightly sand with fine-grit sandpaper (600+ grit), then apply anti-rust oil.  

Severe rust: Replace the hinge to prevent further damage to the cabinet door.  

3. Why Do Hinges Rust?

Many assume "stainless steel = rust-proof," but that's not entirely true. Rust depends on material quality and environmental factors:  

① Does Stainless Steel Rust?  

Yes! The "stainless" property is relative—201 stainless steel rusts more easily than 304, but even 304 can corrode in humid or acidic conditions.  

② Is There Any Metal That Never Rusts?  

No! Even gold (unless 100% pure) or silver can corrode under certain conditions (e.g., exposure to strong acids). Thus, the key factor isn't the material itself but the environment it's in.  

③ Two Main Causes of Hinge Rust  

1) Substandard Quality  

• Industry standards use a 24-hour neutral salt spray test (0–10 rating) to evaluate rust resistance in a 5% salt mist.  

• International brands typically demand Grade 10 (zero rust) and allow random inspections.  

• Domestic brands often meet Grades 8–9 (minor rust permitted) and may only pass pre-selected samples, making actual quality inconsistent.

2) Corrosive Environments  

Common household sources of hinge corrosion include:  

• Dish soap residue (left on hinges after cleaning with soapy cloths)  

• Insecticides/disinfectants (sprayed near hinges and not wiped off)  

• Acetic acid vapors (from vinegar used to deodorize new cabinets)  

• Low-quality silicone sealant (releases corrosive fumes during installation)  

• Sink cabinet exposure (splashes of dish soap, grease, or condiments over time)  

4. How to Prevent Hinge Rust Effectively

When purchasing: Opt for 304 stainless steel hinges with a Grade 10 salt spray test rating.  

When cleaning: Use only dry/damp cloths—avoid dish soap, alcohol, or other chemicals.  

Environmentally: Keep kitchens/bathrooms well-ventilated to minimize moisture and acid exposure.  

In Summary:

Hinge rust isn't irreversible—early detection and action are key. False rust can be wiped away, while true rust may require sanding or replacement. For long-term protection, choose high-quality hinges + proper maintenance to banish rust for good!