The electrovalency of potassium in any of its ionic compounds, such as potassium sulphate, is +1.

Sulfate (SO4) has an electrovalency of -2

The sodium atom has 1 electron in its outermost shell. When forming an ion it donates this electron giving it an overall charge of +1 (having lost a negative charge).

Chlorine atoms have 7 electrons in their outermost shells. When forming an ion these are more likely to take an electron from another atom to form a complete octet (gaining a negative charge) thus it becomes -1.

Both atoms will gain or loose 1 electron, hence why they have the same valency, however the electrovalency depends on whether this charge becomes positive or negative. Hope this helps!

Types of corrosion

1. Induced corrosion due to chloride

2. Pitting

3. Corrosion due to Oxidation

4.Corrosion is due to dissimilar materials

5. Corrosion due to imbalanced electrovalency

In Electro-chemical theory,when two materials of different potential are in contact with each other through electrolyte, the two materials become, one is cathode and the other anode. The ions(electrons ) passes from anode deposited on cathode.

Protection methods:

1.Metallurgical method

2.Corrosion inhibitors

3 Coatings like paintings, epoxy application etc

4. Cathodic protection

5 Galvanisation

6 Balancing of of electrovalency of materials or reducing impurity

7 use of sacrificial anode

The substance that results when electrons are transferred from a metal to a nonmetal consists of ionic bonds, and the substance's melting point also is high. When electrons are transferred from metal to nonmetal, ionic bonds are formed. However, when electrons are shared between two nonmetals, covalent bonds are formed.