r/materials 21h ago

Help me understand Corrosion

3 Upvotes

Hello I am a Chemical Engi. and had asked a similar question in the chem engi sub. but many their stated to not be material engineers so I come here to be bestowed with knowledge, if possible.

I am a student, and was looking into a water treatment process, and wanted to keep my hardware up to specs lowering as much as possible the corrosion and wear on the fluid tanks and pumping systems. I had asked their if cast iron would work and i got a mix of responses. The water id be working with would most likely contain Sulfur and Sulfur oxide byproducts like H2SO4, and most likely heavy metals in particularly Fe most likely. Besides, some other mineral slurry I don´t have more data for, yet. Given the water is acidic and could reach down to pH of 1 or 2 (hopefully not). What materials could work best.

I understand this is a complex answer, so if I'm pointed towards any material I can read up on to inform myself I would also be greatly appreciative. All this corrosion stuff is quite complex.


r/materials 4h ago

Is there a closed equation for the mobility or diffusivity vs. doped concentrations in common semiconductors, or is it all based on experimental observations?

1 Upvotes

I want to create a graph such as this:

but for many semiconductors (Si, Ge, GaAs, InAs...) and also to show the difference between hole and electron. (all in 300k though if it's possible to get the general expression it'll be best as I could generate the graph for many temps)

i tried looking online but I couldn't find such data, so I wonder if there's an equation somewhere or if it's something purely experimental.

I'm also not sure where to ask this.


r/materials 6h ago

Rubber percentage vs butyl in substance ?

1 Upvotes

*Sorry if this the incorrect sub If a fabric has 30%rubber/70%butyl versus 50/50, what would the expected differences be? Specifically in terms of a bladder. Is more rubber equal more bounce? Thank you


r/materials 14h ago

Rare crystal shape found to increase the strength of 3D-printed metal

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techxplore.com
0 Upvotes