Cathodic Protection Tester Practice Exam

What process results in the loss of electrons?

1. Reduction

2. Oxidation

3. Neutralization

4. Electrolysis

The correct answer is: Oxidation

The correct answer is oxidation, which is defined as the process that results in the loss of electrons by a substance. In electrochemical reactions, oxidation occurs when atoms or molecules lose electrons, which often leads to an increase in oxidation state. This is a fundamental concept in redox (reduction-oxidation) reactions, where one species is oxidized (loses electrons) while another is reduced (gains electrons). Understanding oxidation is crucial for cathodic protection, as the aim is to control corrosion through the reduction of metal ions by supplying them with electrons at the cathode, effectively preventing oxidation. By managing the conditions under which oxidation occurs, cathodic protection systems help extend the lifespan of metal structures in corrosive environments, such as pipelines and tanks. The other processes mentioned are significant in their own right, but they do not specifically refer to the loss of electrons. Neutralization involves an acid-base reaction where acids and bases react to form water and a salt, while electrolysis refers to a process that uses an electric current to drive a non-spontaneous chemical reaction but does not inherently focus on the loss of electrons alone.