Baking soda darkens aluminium pans
#0028 Home & daily life
Fact rank
A
Confirmed by a metalware manufacturer and a cleaner manufacturer
Wow rank
S
Baking soda, often seen as all-purpose, has something it must not be used on
Usefulness
S
Prevents damaging a pan, starting today
Verification: Supported by evidence
AI verification reports the evidence it found; it does not guarantee that a claim is true.
Cleaning an aluminium pan with baking soda (an alkali) can make it darken. Do not use baking soda on aluminium pots or pans.
Why
Aluminium reacts readily with alkalis, so baking soda attacks the surface and discolours it.Evidence
Primary A metal tableware maker (Tonami Shoten): baking soda is a no-go on aluminium pans because it causes darkening; for darkening, simmer with something acidic such as apple or lemon for 10–15 minutes and let it cool link
Primary Cleaner manufacturer (Seikatsu to Kagaku Sha): discolouration where alkali touches aluminium is because aluminium reacts with the alkali to form aluminium hydroxide link
Primary Cookware maker (Wahei Freiz): for burnt-on food in anodised pans, soak well in hot or cold water to soften it before removing link
Notes and limits
Darkening (discolouration) and burnt-on food are different things. For darkening, manufacturers suggest simmering something acidic such as apple or lemon in the pan. For burnt-on food, first soak in hot or cold water to soften it. Aluminium touched by alkali may also turn white and powdery. Aluminium can darken through reaction with water even without baking soda. Other alkaline cleaners (sodium sesquicarbonate, dishwasher detergent and so on) are likewise unsuitable for aluminium. Check the product's care notes.
Derivations
Derived from: 汚れと洗剤は相性で選ぶ
Derived facts: —