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Cookware color changed--aluminum?

Old 07-21-20, 06:03 AM
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Cookware color changed--aluminum?

wat is going on? is it still safe to use?
i rescued an Asian rice cooker from the rubbish bin.

previous owner said the bottom of the pot suddenly turned brown after about a year of usage.
and he was about to throw it away.

i just happen to need a rice cooker.

i guess this pot is aluminum....it is very light weight.

Is it safe? wat cause he sudden color change?



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Old 07-21-20, 06:30 AM
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The mildew migrated from your cutting board?
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Old 07-21-20, 07:13 AM
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My best guess, and I'm not claiming absolute expertise.
The bottom of the pot is suffering from micro-pitting and retaining some colour from overcooked rice. I don't believe that the "brown" is of itself dangerous, yet the fact that the pot is already pitting is a sign that some aluminium is getting into the food. This aluminium exposure isn't immediately dangerous to your health yet there is evidence that a prolonged build up of aluminium in your body is a possible/probable factor in Alzheimers disease.
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Old 07-21-20, 08:05 AM
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For non-anodized, non-teflon coated, bare aluminum, that is completely normal and expected.

It shouldn't harm you, but if it worries you, get different cookware.
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Old 07-21-20, 08:06 AM
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Originally Posted by AnthonyG View Post
My best guess, and I'm not claiming absolute expertise.
The bottom of the pot is suffering from micro-pitting and retaining some colour from overcooked rice. I don't believe that the "brown" is of itself dangerous, yet the fact that the pot is already pitting is a sign that some aluminium is getting into the food. This aluminium exposure isn't immediately dangerous to your health yet there is evidence that a prolonged build up of aluminium in your body is a possible/probable factor in Alzheimers disease.

Myth 4: Drinking out of aluminum cans or cooking in aluminum pots and pans can lead to Alzheimerís disease.

Reality: During the 1960s and 1970s, aluminum emerged as a possible suspect in Alzheimerís. This suspicion led to concern about exposure to aluminum through everyday sources such as pots and pans, beverage cans, antacids and antiperspirants. Since then, studies have failed to confirm any role for aluminum in causing Alzheimerís. Experts today focus on other areas of research, and few believe that everyday sources of aluminum pose any threat.
https://www.alz.org/alzheimers-demen...zheimers/myths


Aluminium is seen in the normal, healthy brain. It is not clear how aluminium is getting into the brain from the blood. The levels currently seen in peoples brains hasn't been shown to be toxic but an ageing brain may be less able to process the aluminium. Although aluminium has been seen in amyloid plaques there is no solid evidence that aluminium is increased in the brains of people with Alzheimer's disease. No convincing relationship between amount of exposure or aluminium in the body and the development of Alzheimer's disease has been established.
https://www.alzheimers.org.uk/about-...20established.

Of course I am addressing AnthonyG and the "no amount of science" can dispel the myths and rumors conspiracy theory "expert"... So go on thinking whatever you want... but for anyone else following this thread, the Alzheimers organizations have determined that there is no connection between aluminum and Alzheimers.

Regarding the color in the pan... it appears to be stain, maybe from cooking brown rice... and yes, aluminium can be stained.

But if it bothers you... buy a new pan. Any pan. Rice is easy to cook. Rice cookers are uni-taskers... and take up lots of space for what ANY pan can do. Get a big dutch oven... now that is a useful pot. And a kitchen timer, so you don't burn the rice, and stain the pan.
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Old 07-21-20, 08:10 AM
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You know, the real question should be is, "What did the prior owner do with that cookware?"

I'm bettin' he was melting varieties of wax for lubing bicycle chains.
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Old 07-21-20, 08:46 AM
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This might explain some of Hondo's posts given all those alum cans of Coors Light he's been drinking.

I kid. The alum-Alzheimers link has "No convincing relationship between amount of exposure or aluminium in the body and the development of Alzheimer's disease has been established."
https://www.alzheimers.org.uk/about-...s-and-dementia
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Old 07-21-20, 08:55 AM
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Rescuing someone else's used cookwear from the rubbish bin for anything other than, say, shooting at it, or chemical experiments, ranks right up there with buying their used bike shorts (or underwear) on ebay. If you don't recognize the stain, well, enough said...
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Old 07-21-20, 11:04 AM
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Rice cookers are not uni taskers. That would be ok even so because I make rice for the family dinner two or three times a week. But at a minimum, they make any boiled grain (grits, oatmeal) and steam vegetables or dumplings, maybe at the same time if you are not picky about cooking time. And it turns off automatically. Itís nice to have a pot of food going that doesnít need watching. Itís not as versatile as an instant pot but itís also less of a pain to use.
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Old 07-21-20, 11:09 AM
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When pots start looking like that they become the water trough for the dogs and outside cats. Have several in various places around the place.
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Old 07-21-20, 11:19 AM
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Originally Posted by Darth Lefty View Post
Rice cookers are not uni taskers. That would be ok even so because I make rice for the family dinner two or three times a week. But at a minimum, they make any boiled grain (grits, oatmeal) and steam vegetables or dumplings, maybe at the same time if you are not picky about cooking time. And it turns off automatically. Itís nice to have a pot of food going that doesnít need watching. Itís not as versatile as an instant pot but itís also less of a pain to use.
I was intending to get a rice cooker for the types of cooking you mentioned. But man, instant pot type doo-dads are so flippin' cheap, and can do so much more...especially cooking dried legumes. Typical rice cookers are not particularly good at that.
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Old 07-21-20, 11:25 AM
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Originally Posted by CyclingFool95 View Post
Rescuing someone else's used cookwear from the rubbish bin for anything other than, say, shooting at it, or chemical experiments, ranks right up there with buying their used bike shorts (or underwear) on ebay. If you don't recognize the stain, well, enough said...
Who peed in your rice cooker this morning?
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Old 07-21-20, 11:29 AM
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Just for fun, see what happens when you treat it with CLR. Then put it back in the bin for someone else to find and wonder about.
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Old 07-21-20, 01:21 PM
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Originally Posted by Darth Lefty View Post
Rice cookers are not uni taskers. That would be ok even so because I make rice for the family dinner two or three times a week. But at a minimum, they make any boiled grain (grits, oatmeal) and steam vegetables or dumplings, maybe at the same time if you are not picky about cooking time. And it turns off automatically. Itís nice to have a pot of food going that doesnít need watching. Itís not as versatile as an instant pot but itís also less of a pain to use.
Well I won't argue the issue of not having to watch it... as I do that with a slow cooker. But imagine a kitchen filled with all these things like rice cooker, slow cooker, deep fat fryer, toaster and a few other items, and suddenly you have no counter or cabinet space. A dutch oven can braise, cook soup, make rice, oatmeal etc, and yeah, you need a kitchen timer and have to pay a bit of attention... but it does it all.

But I understand, if you are eating anything like rice on a daily basis, a rice cooker is justified.

Me, I use an 8 quart pan, get it going to a boil, cover it, set the fire on the lowest setting and set a timer, When the timer goes off I turn off the heat. Leave it covered. Brown rice 40 min, White rice 20 min... either one, remove the cover after it has cooled... you have rice. I like my rice with ginger cooked into it... and I tend to use broth for better flavor.

Now having said that, my wife was just gifted an instant pot... We first have to figure out where to store the damn thing... then read the instructions.

The dutch oven sits on the stove... we use it for everything, so we don't store it.
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Old 07-21-20, 02:04 PM
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I believe it is just a heavy oxide layer.

I have had several pots end at a similar color with extensive use. Notably a large brew kettle.

You can strip the brown layer with barkeepers friend and elbow grease. Probably should then boil a bit of clean water to build a thin oxide layer back up.

Side note, you start to get a similar goldish color if you have something hard anodized but not dyed. The color gets darker as the coating gets thicker.
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Old 07-21-20, 02:12 PM
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My $0.02: You don't want to mess with a non-non-stick rice cooker. When we upgraded from a rice cooker that looked like that, to one with a non-stick pot, the easier cleanup was awesome! Will never go back.

But if you don't mind soaking and scrubbing, I would scrub hard with soap, run a test batch of rice, sniff it, taste it, eat it (stop at any point if something seems off), and if the rice it cooks is ok, you're ok.
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Old 07-21-20, 03:10 PM
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It can still be used as a hat.
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Old 07-21-20, 03:44 PM
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Originally Posted by CyclingFool95 View Post
Rescuing someone else's used cookwear from the rubbish bin for anything other than, say, shooting at it, or chemical experiments, ranks right up there with buying their used bike shorts (or underwear) on ebay. If you don't recognize the stain, well, enough said...
Apparently, you never eat out.
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Old 07-21-20, 06:39 PM
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Originally Posted by genec View Post
https://www.alz.org/alzheimers-demen...zheimers/myths

Of course I am addressing AnthonyG and the "no amount of science" can dispel the myths and rumors conspiracy theory "expert"...
Shall we have a battle of links?
https://www.technologynetworks.com/n...disease-329670

I clearly stated that the aluminium exposure was cumulative and that after a lifetime of exposure there is definitely an alzheimers risk.

Pitted aluminium is definitely worse than clean new aluminium or anodised aluminium.
These automatic cookers are cheap and I would throw it out.
I also cook rice regularly and I use the absorption method in stainless steel saucepans.
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Old 07-21-20, 07:06 PM
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Originally Posted by Seattle Forrest View Post
It can still be used as a hat.
In a thunderstorm?
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Old 07-21-20, 07:09 PM
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Originally Posted by genec View Post

Me, I use an 8 quart pan, get it going to a boil, cover it, set the fire on the lowest setting and set a timer, When the timer goes off I turn off the heat. Leave it covered. Brown rice 40 min, White rice 20 min... either one, remove the cover after it has cooled... you have rice. I like my rice with ginger cooked into it... and I tend to use broth for better flavor.
Dadgum, that'll make a lot of rice.
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Old 07-21-20, 07:56 PM
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Originally Posted by FiftySix View Post
Dadgum, that'll make a lot of rice.
Just think of all the Cajun spices and foods like crawdads mixed in 8 quarts of rice. Red beans and rice, yum. Dang I must be hungry Iím going to make me a sandwich.
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Old 07-21-20, 08:36 PM
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i do recall reading about hazard of using aluminum canteen bottles, bitd.

we just bought one of these Korea inoble pans which is nonstick and coating looks like ceramic.
but it is so light weight, it must be aluminum. so a little worrying, but it was not my call to buy.
it was on sale for $15.

looks exactly like this.
https://www.amazon.com/Alpha-Inducti.../dp/B072J2KB5H

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Old 07-21-20, 08:43 PM
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Originally Posted by Hondo Gravel View Post
Just think of all the Cajun spices and foods like crawdads mixed in 8 quarts of rice. Red beans and rice, yum. Dang I must be hungry Iím going to make me a sandwich.
Crawfish etouffee. Mmmmm.

My Cajun wife has been in Texas so long that she cooks more Tex-Mex food now than her ol' family Cajun specialties.
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Old 07-21-20, 08:46 PM
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Originally Posted by RubeRad View Post
My $0.02: You don't want to mess with a non-non-stick rice cooker. When we upgraded from a rice cooker that looked like that, to one with a non-stick pot, the easier cleanup was awesome! Will never go back.
Indeed. We cook rice in a teflon coated inside / anodized outside, aluminum sauce pan.

But we only cook 2 cups at a time, not 8 quarts.
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