Corrosion is a pressing concern that industrialists deal with while trying to increase their production capacity and income. It amounts to a loss of billions of dollars annually. The global economy loses $5000 bn USD every year in the name of corrosion. The Defense Department in the U.S. loses around $20 bn each year while dealing with corrosion.

Corrosion not only hinders commercial growth but also imposes risk to health and infrastructure.

Before diving into the details of corrosion-causing factors, it is important to know about the types of corrosion.

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  • General Corrosion: It is the common corrosion that takes place due to an electrochemical reaction, causing the metal to disintegrate. It is the easiest to control, as it is predictable.
  • Stress Corrosion: This type of corrosion occurs when repeated stress is applied to a material. This is observed in machinery that is subjected to weldingor mechanical lifting.
  • Elevated-temperature corrosion: This type of corrosion is observed in machinery that operates at high temperatures, normally above 750°F.
  • Flow-based corrosion: This takes place when the oxide layer on metal dissolves due to water or other fluids, exposing the metal to corrosion and deterioration.

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Before minimizing corrosion, you need to know the environmental factors that stimulate the corrosion process.

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Industrial atmosphere has a high concentration of chloride ions, which serve as corrosive agent. Furthermore, atmosphere contains water droplets from seashore. These droplets of water react with chloride ions to induce Stress Corrosion Cracking (SCC).

A study concluded that corrosion rate is inversely proportional to the distance of an industry from the seashore.

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Temperature has a significant impact on corrosion rate. Higher temperature increases the corrosion rate. Most of the industrial processes operate at elevated temperatures, increasing chances of corrosion.

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The atmosphere contains pollutants of sulfur dioxide. These are emitted due to various industrial processes. According to statistics of 2016, 2.71 million tons of sulfur dioxide emission took place in the United States. This atmospheric SO2 forms a protective layer over the steel. The increased concentration of SO2 causes the metal to disintegrate.

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Industrial environments that have pollutants of hydrogen sulfide in the atmosphere are termed as “sour environments”.  Equipment that are exposed to sour environment, undergo pitting corrosion.

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Corrosion of a metal depends on the duration to which the metal is exposed in a corrosive environment. Equipment that is exposed to the corrosive environment for a longer duration tends to corrode more rapidly.

The corrosion impact of these factors can be controlled by aluminizing your equipment. VaporKote offers aluminizing and boronizing services for corrosion protection for steel. We cater to all the industrial needs of our customers in Anaheim, CA.

Contact us today and get engineering solutions for your industries.

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