3

Going back to 2009, Statcounter has timeseries data and custom filters and geographical regions. Resolution goes down to "daily". http://gs.statcounter.com/os-market-share#monthly-200901-201805 Click Download Data (.csv) to get the raw data.


3

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: https://www....


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