All Questions
Tagged with materials chemical-engineering
31
questions
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324
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Will petroleum jelly degrade silicone elastomer?
I have gotten conflicting information on this question. If I put a bit (1/4 of a cc) of vaseline on a silicone elastomer part and then apply gentle pressure for hours will this degrade the elastomer? ...
- 101
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votes
2
answers
88
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Is there any special coating or paint that will strongly bond to an automobile tire's tread and can be driven on?
I would like to know if there is any special coating or special paint that can be applied to the tread of an automobile tire, strongly bonding to it, and which is strong enough and durable enough to ...
- 303
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votes
1
answer
56
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What materials where used in this study or ones that would make the most sense please!
I understand that they used two different materials and combined them through fiber drawing process but I don’t truly understand which materials were used. Here is where it is mentioned in the article....
- 1
1
vote
1
answer
64
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Reactor tube material at moderately high temps (600-1000 C) with water vapor as primary constituent of flow
I work with a type of spectrometer (made by Picarro) that uses near-infrared lasers to measure the stable isotopic composition of water vapor. The samples measured are typically liquid water samples ...
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1
answer
33
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Is half of depletion region a part of N region or P region?
Is it correct to say that if the P-N junction is in the middle of the depletion region, half of the depletion region is for the P region and the other half is for the N region?
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23
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Size characterization
Which technique can I use to characterize the size of my particles? They would be in the range of 50 μm to 300 μm. I have verified using a microscope, but I need a technique to analyse the size ...
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votes
2
answers
31
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Preventing leakage in sludge tank
I recently went on a tour to a local water company plant where we were shown a sludge tank which is where the sludge in the water is removed and stored here.
The sludge can be acidic and so can cause ...
- 163
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2
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875
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Aluminum or Copper, which one is better to control and maintain the temperature?
Friends, I am an EE/SW/Controls eng. Please, pardon me of perhaps incorrect terminologies.
I am working on a R&D project: A chemical lab equipment has a 2" long metal pipe enclosed in ...
- 105
2
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28
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Book recommendation for hydrodynamics of bubbles, drops, and particles
I am wondering if someone could please recommend to me some references on the topic of hydrodynamics of bubbles, drops, and particles, preferably in the context of complex and bio fluids.
I am ...
- 21
-1
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1
answer
832
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sinking speed of particle in water
For a Newtonian fluid the sinking final speed of a metal particle is given by this equation :
while g is Gravitational acceleration , $\rho_P$ = is particle density , $\rho_F $ = is fluid density ,...
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1
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1
answer
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Safe temperature thresholds for #2 HDPE and #5 PP plastic
It would be convenient to use a temperature adjustable heat plate (element)/mug warmer for the massive amount of blender bottles accumulated over the years.
What are safe thresholds to safely warm the ...
- 111
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51
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How is EPD different / related to anodising?
What is the process of applying dye to anodized surfaces (specifically aluminum)?
Is electrophoretic deposition (EPD) just the process used to apply the dye to anodised surfaces?
Or is it a ...
- 121
1
vote
0
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57
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Considerations for switching from Conc. Sulphuric acid to Oleum
First off - this project is still in the early planning stages. The basic scope is that a plant want's to switch from using conc. sulphuric acid (~98%) in its process (nitration) to oleum.
I ...
- 145
0
votes
1
answer
41
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Carefully attaching Pt-wire to mild/carbon steel surface
Problem:
I have a near 100% Pt wire (25 AWG / D ≈ 0.45mm) that I would like to attatch to a cold rolled steel (E235 / EN 1.0308) surface. Assume this surface is flat.
Goal:
Keep wire attached to ...
1
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0
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189
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What are the raw materials for water filter housing production? [closed]
I want produce water filter housing (like below images)
who can tell me what are need raw material for these?
Best Regards
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