So today I went to a flea market and found a copper pan with a stainless steel lining. I cleaned it thoroughly and the first thing I wanted to try is to caramellize sugar (because of the lack of fryable vegetables and meat in my fridge). While heating the empty pan it made some scary knocking noises as if I would take a spoon and tap the pan. Furthermore I saw steam escaping from somewhere at the pan. I thought this steam comes from the handle or somewhere else where I didn't dry the pan thoroughly enough.

Later on I searched for English, German, and Italian reviews and found a one and only bad review in German of a similar pan on Amazon. It basically says that water can be trapped between the copper and the steel and thus causes bulges and in the worst case an explosion.

Is the ingress of moisture between the copper layer and steel layer a thing? Was this pan a bad bargain?

So today I went to a flea market and found a copper pan with a stainless steel lining. I cleaned it thoroughly and the first thing I wanted to try is to caramellize sugar (because of the lack of fryable vegetables and meat in my fridge). While heating the empty pan it made some scary knocking noises as if I would take a spoon and tap the pan. Furthermore I saw steam escaping from somewhere at the pan. I thought this steam comes from the handle or somewhere else where I didn't dry the pan thoroughly enough.

Later on I searched for English, German, and Italian reviews and found a one and only bad review in German of a similar pan on Amazon. It basically says that water can be trapped between the copper and the steel and thus causes bulges and in the worst case an explosion. This review doesn't mention any noises.

Is the ingress of moisture between the copper layer and steel layer a thing? Was this pan a bad bargain? And how can I distinguish bad pans from good pans except by looking for reviews in the internet? Are there characteristics that I can look for (e.g. how the edge looks like where the copper layer and steel layer end)?

So today I went to a flea market and found a copper pan with a stainless steel lining. I cleaned it thoroughly and the first thing I wanted to try is to caramellize sugar (because of the lack of fryable vegetables and meat in my fridge). While heating the empty pan it made some scary knocking noises as if I would take a spoon and tap the pan. Furthermore I saw steam escaping from somewhere at the pan. I thought this steam comes from the handle or somewhere else where I didn't dry the pan thoroughly enough.

Later on I found a one and only bad review of a similar pan in the same series on Amazon. It basically says that water can be trapped between the copper and the steel and thus causes bulges and in the worst case an explosion.

Is the ingress of moisture between the copper layer and steel layer a thing? Was this pan a bad bargain?

So today I went to a flea market and found a copper pan with a stainless steel lining. I cleaned it thoroughly and the first thing I wanted to try is to caramellize sugar (because of the lack of fryable vegetables and meat in my fridge). While heating the empty pan it made some scary knocking noises as if I would take a spoon and tap the pan. Furthermore I saw steam escaping from somewhere at the pan. I thought this steam comes from the handle or somewhere else where I didn't dry the pan thoroughly enough.

Later on I searched for English, German, and Italian reviews and found a one and only bad review in German of a similar pan on Amazon. It basically says that water can be trapped between the copper and the steel and thus causes bulges and in the worst case an explosion.

Is the ingress of moisture between the copper layer and steel layer a thing? Was this pan a bad bargain?