Putting a hot cast iron pan in water can lead to several consequences, some of which may be damaging to the pan or pose risks to your safety:
Warped or Cracked Pan: Cast iron is prone to thermal shock, which means sudden changes in temperature can cause the metal to expand or contract rapidly. Placing a hot cast iron pan directly into water can lead to thermal shock, causing the pan to warp, crack, or even shatter.
Damage to Seasoning: Cast iron pans are often seasoned with a layer of oil to create a natural non-stick surface and protect the metal from rust. Plunging a hot pan into water can damage this seasoning, making the pan more susceptible to rust and reducing its non-stick properties.
Steam and Splattering: When you put a hot pan in water, it can create a lot of steam instantly, which may lead to hot water splattering and potentially causing burns or scalds.
Rust Formation: If the seasoning on the cast iron pan gets damaged or washed away due to the rapid temperature change and exposure to water, the pan may be more susceptible to rust formation. Rust can compromise the integrity of the pan and affect the taste and safety of the food cooked in it.
Release of Harmful Chemicals: In some cases, extreme temperature changes and exposure to water might lead to the release of harmful chemicals or fumes, though this is less common with cast iron compared to some other cookware materials.
To avoid these consequences, it's essential to handle cast iron pans with care:
Allow it to cool naturally: After cooking with a cast iron pan, let it cool down on a heat-resistant surface or a cooling rack. Avoid placing it directly on a cold surface or submerging it in water until it has cooled.
Cleaning: When cleaning a cast iron pan, it's best to use warm water and a soft sponge or brush. Avoid harsh soaps and metal scrubbers that can strip away the seasoning.
Avoid soaking: While it's generally not recommended to soak cast iron pans in water for extended periods, a brief soak with warm water to loosen stuck-on food can be acceptable. Always dry the pan thoroughly after washing to prevent rust.
Re-seasoning: If the seasoning on your cast iron pan becomes damaged, you can re-season it by applying a thin layer of vegetable oil and baking it in the oven.
By handling your cast iron pan properly and with a little extra care, you can maintain its longevity, non-stick properties, and overall cooking performance.