Why Use Metal Identification Microscopy in Metal Classification?
They have been used to identify cells and tissues. They have been used to recognize diseases and obtain information that will help develop proper medications. They have been used to just about everything that relates to life and its components. But as time goes by, microscopes are also used to identify different materials from the earth’s crust to cope up with societal needs. Hence, the emergence of metal identification microscopy is a welcome addition to the world of microscopy.
Metal identification microscopy has contributed a lot to applied science, earth science, and engineering particularly in the field of Civil Engineering. Proper identification of metals creates a great impact in the stability and durability of the metals used in construction, maintenance, and planning of key infrastructures.
Overview
To date, there are about 100 recognized elements and nearly ¾ are classified as metals. Each metal has its own characteristic, based from its chemical and physical properties. And to distinguish each metal from the others is to employ the services of metal identification microscopy. Here, experts use a specially designed microscope to identify a specific metal. This type of microscope is known as inverted metallurgical microscope.
In the science of metallurgy, it is possible to study the chemical and physical behavior of metals as well as their mixtures for use in engineering or consumer products.
Since metals vary greatly depending on their physical and chemical characteristic, it is important to classify them accordingly so as to achieve the desired result. For example, some metals are more malleable than the others. There are metals that create a layer of oxide on their surface which does not allow additional oxygen molecules penetrate the area. Hence, these metals retain their good conductivity and luster longer.
Moreover, not all metals can be used altogether in a single purpose. For instance, there are metals used in common engineering principles. Most metals are also dependent on their operating environment, where some specific metals can produce well-designed results due to their resistance on certain failure modes such as metal fatigue, environmental stress failure, corrosion, creep, and stress concentration.
The Process of Identifying Metals
Some people may not understand this but it is important to identify metals especially in applications that require specific use of certain metals. For instance, in welding, proper identification of metals will eliminate or at least lessen downtime. Hence, you can always be sure of high quality and strong weld.
The basis for such theory is that components of a certain metal can greatly affect the results in certain processes like welding. For instance, the amount of carbon in steel must be ascertained because steel with carbon content higher than 0.25% will need special considerations. The science of welding is that when the carbon content is high, there is greater probability that the material being welded will be vulnerable to hardening and hot-cracking. This will, in turn, produce materials with poor ductility or the capacity of a substance to distort like plastic without reduction of area in a tensile test, being measured by elongation, or fracturing.
Consequently, identifying metals for welding purposes usually undergo three methods: file test, chipping, and the color test. File test refers to a workshop file that you can use as a reference from time to time. This is usually utilized on unknown steel, for example.
Chipping test refer to removing small pieces of metal using a chisel. These pieces of metal can be further observed and their properties determined using an inverted metallurgical microscope.
Color test provides metal identification in an easy manner. Through its distinct color, a certain type of metal can be determined.
However, for further classification and to understand the chemical properties of metals, metal identification microscopy should be used. This will enable observers to determine the chemical composition of the metal as well as its capacity to endure consequence with the environment.
For example, if you are to use metals that should have high corrosion resistance or those that can withstand sunlight, heat, humidity, and water, then you must test these metals using these factors and take note of their reaction. Structural alloys decay easily just by exposing them to air moisture.
Since metals react with oxygen in the air, changes in metals will vary deeply. Take iron for example. Through oxidation or when this type of metal is exposed to air and moisture, they will rust in due time.
Other chemical properties like acidity or alkalinity of metals and their resistance to acids can be observed and determined using metal identification microscopy.