METAL CORROSION AND IDENTIFICATION
In this lesson, you will learn how to identify corrosion on metal, what causes corrosion, and how to
TERMINAL LEARNING OBJECTIVE:
You will describe the procedures for identifying the types of corrosion, what causes
it, and steps to control it.
You will be given the material contained in this lesson.
You must complete the lesson and the practice exercise.
REFERENCES: The material contained in this lesson was derived from the TM 5-800 series, EM
1110-2-3400, and OPNAVINST 5100.23D.
The corrosion of metal is a constant enemy of the military, causing extensive damage to towers,
pipelines, trucks, aircraft, and almost any other item made of metal. Corrosion quietly eats away the
understructure or heart of a system. The problem is never-ending. In this lesson, you will learn how to
identify corrosion, find out what causes it, and learn how to control it on various types of metal.
PART A: CORROSION
5-1. Definitions. Since the corrosion of metal results in such tremendous loss of materials, time, and
money, just what is corrosion? Let's consider three different definitions:
An engineer from the Electrochemical Society of New York stated, "Corrosion is the
destruction of a metal by chemical or electrochemical reaction with its environment."
A reservoir engineer says, "Corrosion is a process of nature designed to increase the
horizontal permeability of the casing."