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- Ionic Concentration: 3.5%
- Pressure: Up to 10,000 PSI
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- Threat: Hull Oxidization and Corrosion
- Conclusion: Hull needs protection
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- Oh nooooooo
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- Meanwhile on the Surface
- Nooooooo
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- After Grieving...
- So how could we have prevented this?
- By Using Zinc!
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- Everything! But we need to start with the basics. Its atomic Number is 30
- And its atomic mass is... 65.390 Its on the board behind you
- Exactly!
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- But the key is its electron configuration: [Ar] 4s² 3d¹⁰
- Meaning it has 2 electrons it can lose
- Yup, that's why it's in Group 12, a transition metal
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- Iron is also Group 12, why can't we use that?
- Zinc has a larger atomic radius than Iron, so its outer electrons are held less tightly
- So its ionization energy is low, so it gives away electrons easily.
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- Because its configuration is [Ar] 4s² 3d¹⁰, the d subshell shields the valence electrons
- Which is why it easily loses the 4s² electrons
- Which is why Zinc is so useful!
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- I still don't get it
- Thats fine, we just needed to agree that Zinc likes to lose 2 electrons
- Alright we agree
- So, what was the hull of your AUV made of
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- Well, it was made of Aluminum
- And what does Aluminum do in water?
- It rusts?
- Exactly
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- So it loses its electrons first?
- Exactly
- I still don't get it
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- Think of it like a mob of angry people sieging a castle
- So, the Castle is the AUV?
- Yup!
- And the people are the water?
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- Yes, the people are the water, so imagine like a lot of people trying to break into a Castle
- Okay so what's Zinc?
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- Zinc will give its electrons away, meaning Aluminum won't oxidize
- So Aluminum won't rust!
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- So the knights will sacrifice themselves
- The Zinc is sacrificial, it's called a Sacrificial Anode
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- So we just need to cover the hull in Zinc
- Then the aluminum won't rust
- So the AUV is Saved
- Yup!
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- Often, Factories often produce robotics parts by Zinc die-casting
- The parts produced provide EMI/RFI shielding
- They're also self-lubricating
- They're really useful for manufacturing robots!
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- Often, Factories often produce robotics parts by Zinc die-casting
- The parts produced provide EMI/RFI shielding
- You just have to be careful while manufacturing it, as it can be toxic
- They're really useful for manufacturing robots!
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- So are robots made of pure Zinc?
- Not exactly
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- There are also experiments of Zinc in nanorobotics
- That sounds cool!
- It is but its very experimental technology
- The main importance of Zinc is its galvanization protection
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- So to recap
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- Zinc provides excellent Galvanic Protection
- Which is useful to prevent rust in AUVs
- Exactly, its used everywhere from Cars to AUVs
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- However, mining Zinc requires a lot of power
- Which produces greenhouse gases
- However, it can be recycled, unless it's die-cast Zinc
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- Are there any alternatives to Zinc?
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- It rusts?
- Exactly!
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- 3 Weeks Later
- Hull Integrity Failing...
- Will explode in 3 2 1...
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- Who are you?
- I'm Alex, a Robotics Engineer
- Okay? Why would Zinc, the stuff in sunscreen, prevent the AUV from imploding?
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- Yes, but it's the Electronegativity thats important
- Which is low due to its electron configuration
- Yup it's very low, it actually wants to give electrons away
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- So just make it out of Zinc then!
- Not exactly...
- Zinc is more electronegative than Steel
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- The Zinc is the knights
- So the Zinc protects the AUV
- Yes, the knights will give their lives to protect the Castle because they are more electronegative
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- What else can we do with Zinc?
- Plenty of stuff
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- This means we can use Zinc to form alloys specific for each robot
- What else is Zinc useful for?
- Other than Micro-robots not much
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- Its can also be used to make strong parts
- Though it is weaker than Steel
- But its much cheaper!
- However, when it's used for Die-Casting, it can be toxic!
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- Outside of manufacturing its non-toxic and used everywhere!
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