#ChemFact3

☆ Corrosion

⇛What is corrosion ?

↠ Slow destruction of metals due to chemical reactions on their surface by oxygen, carbon dioxide , moisture etc. in the atmosphere , is known as corrosion of metals .

Some examples -
1. Rusting Of Iron :
Rust is an iron oxide, a usually reddish-brown oxide formed by the reaction of iron and oxygen in the catalytic presence of water or air moisture . 
General formula of rust is Fe2O3⋅nH20 . 
   - What does the 'n' signify ?
       As rust forms when pure iron is in contact with the atmospheric moisture , there will be some water molecules trapped in it but we can't be sure so as to how many water molecules will be there . So 'n' here means 'a number of water molecules' 

2. Rancidity :
The oxidation of oil on fat in a food resulting in a bad smell and taste , it becomes harmful to eat .


Methods to prevent corrosion :
1. Galvanization  : The process of applying zinc on the Iron surface is known as galvanization . It prevents the direct contact of iron with the atmosphere and prevents rusting
2. Painting the surface of the metal with paint
3. Refrigeration of food : It prevents the oxidation of oils in the food and thus the food doesn't undergo rancidity .
4. Electroplating a corrosion-less metal on to the original metal 
and so on


Comments

Post a Comment

Popular posts from this blog

LLMs and Gen AI , Part 1

LLMs and Gen AI  LLMs  (Large Language Models) f ocus on processing and understanding existing vast amounts of text data. They can use this understanding to perform various tasks like text generation, translation, and question answering, but the core remains working with existing information.  They  primarily rely on deep learning architectures like Transformers, which are adept at finding patterns and relationships within massive amounts of text data. LLM helps in doing practically everything such as: Content creation: Writing different creative text formats based on existing styles. Chatbots and virtual assistants: Powering chatbots for natural conversations and answering questions. Machine translation: Translating text between languages while preserving meaning and context. Text summarization: Creating concise summaries of factual texts. Some LLMs can be used for generative tasks, especially when conditional generation techniques are ...
Read more

#ChemFact1

Think about it                Imagine that you went to a party and had lots of fast food . As soon as you reached home , your stomach started paining due to acidity .  [ Acidity , also called as acid reflux , happens when the stomach produces HCl more than necessary for digestion . The excess acid comes up the esophagus leading to a burning sensation near the chest area ]  The homemade remedy for Acidity is to drink cold milk . Let's recall what we learnt previously in our childhood , that is , the active component of milk is Lactic Acid (C 3 H 5 O 2 OH) ! The fascinating yet confusing thing about this remedy is that we are using an acid(Lactic acid) to neutralize another acid(HCl) !! We will understand why this happens after we learn  Brønsted–Lowry acid–base theory  .  Both  Brønsted and Lowry gave a theory (individually) stating that Acid :-    Any compound which has the tendency to donate a p...
Read more