I am looking for a dataset to contain environment-metal details such as: humidity, temperature, chemistry, stress, erosion.
Is there a metals corrosion open dataset, or one from which you could get such data?
For generic corrosive properties, this is a typical question for a scientific and engineering reference book, like the CRC Handbook (check your local library)
But for specific materials, these will come from the manufacturers. Try searching "corrosion tables" with some other keywords, until you find the one that works. Here are some examples:
http://steelfinder.outokumpu.com/corrosion/ --> search "acetic acid"