Why less originated area act as anode in a metal ?

AI Thread Summary
In electrochemical corrosion, areas of a metal that are less exposed to oxygen act as anodes, while regions with higher oxygen concentration function as cathodes. This phenomenon occurs when metals are exposed to moisture and air, leading to corrosion processes. The term "originated area" was initially unclear but was clarified to refer to oxygenated areas, emphasizing the role of oxygen concentration in determining anodic and cathodic behavior in corrosion.
ajayguhan
Messages
153
Reaction score
1
Why less originated area act as anode in a metal ?
 
Chemistry news on Phys.org
What do you mean by "originated area"?
 
Sorry it's oxygenated
 
I am still not sure what the question is really about. In what context was it asked?
 
A metal undergoes a electrochemical corrosion when exposed to moisture air. The parts which are less exposed to oxygen will act as anode and the more oxygen concentrated area will act as cathode
 

Thread 'Humidity of a saturated NaCl solution with anticaking additive'

I want to test a humidity sensor with one or more saturated salt solutions. The table salt that I have on hand contains one of two anticaking agents, calcium silicate or sodium aluminosilicate. Will the presence of either of these additives (or iodine for that matter) significantly affect the equilibrium humidity? I searched and all the how-to-do-it guides did not address this question. One research paper I found reported that at 1.5% w/w calcium silicate increased the deliquescent point by...
View full post »

Thread 'Why does having 8 valence electrons make an element inert?'

I was introduced to the Octet Rule recently and make me wonder, why does 8 valence electrons or a full p orbital always make an element inert? What is so special with a full p orbital? Like take Calcium for an example, its outer orbital is filled but its only the s orbital thats filled so its still reactive not so much as the Alkaline metals but still pretty reactive. Can someone explain it to me? Thanks!!
View full post »

Thread 'Resists for etching Aluminium with NaOH'

I'm trying to find a cheap DIY method to etch holes of various shapes through 0.3mm Aluminium sheet using 5-10% Sodium Hydroxide. The idea is to apply a resist to the Aluminium then selectively ablate it off using a diode laser cutter and then dissolve away the Aluminium using Sodium Hydroxide. By cheap I mean resists costing say £20 in small quantities. The Internet has suggested various resists to try including... Enamel paint (only survived seconds in the NaOH!) Acrylic paint (only...
View full post »

Similar threads

Question about battery -- Looking into the electrode effects on the battery
Replies
4
Views
2K
Are Anodic and Cathodic Tafel Curves Indicating Uneven Electrodeposition?
Replies
12
Views
3K
Why are metals in aqueous solution basic, and non-metals acidic?
Replies
1
Views
2K
Group I/II Metal oxides always basic in aqueous solution -- why?
Replies
3
Views
2K
Sacrificial Anode on isolated copper alloy pipe
Replies
9
Views
1K
How Batteries Work: Anode, Cathode & Electrolyte Explained
Replies
3
Views
3K
Electrolytic Reactions: Anode vs Cathode
Replies
13
Views
5K
Electrolytic Cell: Anode, Cathode & Charge Explained
Replies
4
Views
3K
Why do the d, f orbitals of transition metals have less reactivity?
Replies
1
Views
2K
Why is perforated cathode used in the discovery of anode rays?
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top