The document discusses corrosion protection techniques such as corrosion inhibitors and concrete coatings. It defines corrosion and corrosion inhibitors, describing the types of inhibitors and how they work to reduce corrosion. Organic inhibitors form protective films while inorganic inhibitors affect anodic or cathodic reactions. Concrete coatings are described as liquids applied to concrete to protect and beautify structures. Epoxy, polyurethane, polyaspartic and acrylic coatings are covered along with their advantages of being economical, durable and low maintenance and disadvantages like potential slipperiness.
2. 1. Corrosion Protection Techniques
2. Corrosion inhibitors.
3. Concrete Coatings.
4. Case study
Synopsis:-
3. Content...
What is corrosion?
Corrosion mechanism
Protective measures against corrosion
Methods of protecting metals
Corrosion inhibitors and types
Advantages and disadvantages of corrosion inhibitors
Concrete coating
Types and where to use it
Advantages and disadvantages of concrete coating
4. What is Corrosion?
The Process of Deterioration Or Destruction and
consequent loss of a solid metallic material
through Electro-chemical attack by its
environment starting at its own surface.
(Reverse of Extraction of Metals)
5. Anodic Reaction:
Fe Fe + 2e
Fe + 2(OH)2 Fe(OH)2
Fe(OH)2.2H2O + O2 4Fe(OH)3
Cathodic reaction :
4e- + O2 +H2O 4(OH)
16. Corrosion Inhibitors:
A corrosion inhibitor is an admixture
that is used in concrete to prevent the
metal, embedded in concrete from
corroding.
There are various types:
17. Organic
Adsorption: Protect the method by forming a hydrophobic film
on the metal surface.
Inorganic
Anode: Type forming a protective oxide film on surface of
metal.
Cathode: Slows down the cathodic reaction to rust the
diffusion of reducing species to metal surfaces.
Mixed: Film forming compounds that reduces both anode and
cathode reactions.
18. Advantages:
* Reduces the ions & mass adsorption onto metal
surface.
* Reduce the anodic reaction on metal surface.
* Easy to apply in the situ application.
Disadvantages:
* Expensive to use with large amount of liquid.
* May cause increase in corrosion if incorrectly used.
When to use corrosion inhibitors???
20. Concrete coatings: Liquid or semi-liquid that is applied to
cure concrete for aesthetic reasons as well as to make the
structure last longer and to reduce maintenance and repair
costs.
Types:
Epoxy floor coatings.
Polyurethane floor coatings.
Polyaspartic floor coatings.
Acrylic floor coatings.
21. Epoxy floor coatings:
Two part systems consisting of a part A resin and part
B hardener.
Epoxy is applied to floor with a depth of atleast 2mm. Any epoxy
less then 2mm thick is commonly known as epoxy floor coating.
22. Types and where to apply them:
Self levelling epoxy floors – Manufacturing buildings,
kitchens, showrooms etc,,
Epoxy mortar floor – Mechanical space, restaurants,
etc,,,
Quartz filled epoxy floor – Used in decorative spaces.
Epoxy flake floor – locker rooms, sports, clinics,
commercial etc,,
Anti static epoxy floor – electrical, chemical,
manufacturing facilities that uses flammable liquids.
23. Polymethane coating:
A highly flexible , highly abrasion resistant coating that is
known for its shine and longevity.
Eg:- Wood surface, cabinets, furniture etc..
Polyspartic flooring coating:
A protective layer of aliphatic
polyureathat is applied to metal or
concrete floor surfaces.
This coating is durable.
Surfaces are layered by spraying, painting, or
plastering.
Acrylic floor coating:
An interior or exterior semi gloss,
industrial grade single component
water bone floor coating.
24. ADVANTAGES OF CONCRETE COATING:
Economical
Eco friendly
Tough and durable
Long lasting
Low maintainance
Versatile utility
Design freedom
Simple beauty
25. DISADVANTAGES OF CONCRETE COATING
Slippery when wet
Vulnerable to abrasion
May require professional work
Its not cheap
