Aircraft Corrosion Engineering at-aerospaceservice

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Corrosion can be defined as the deterioration and degradation of the mechanical properties of a material interacting with the environment. In particular, the mechanical properties are the driving forces in the design of commercial, military, and private aircraft. Corrosion in airframes must be considered as a major problem because it directly affects safety, economic, and logistic issues. Since many aircraft structures are made of metal, and the most insidious form of damage to those structures is corrosion. From the moment the metal is manufactured, it must be protected from the deleterious action of moist, oxygen-rich air, especially if it carries salts from ocean waters, is particularly damaging to metal components.  
Left unchecked, corrosion can cause structural failure, but because the appearance of corrosion varies with metals, it can go undetected. In some types of metal, pitting and etching indicate corrosion, while copper and copper alloys show corrosion as green or red deposits. Corrosion is part of the normal wear and tear of an aircraft, and minor corrosion may not significantly alter the strength of the metal. However, leaving the corrosion unchecked could result in cracks, which is why addressing aircraft corrosion is critical to pilot safety. Treating corrosion depends on the type of metal, the part of the aircraft that becomes corroded and what caused the corrosion. Corrosion can be effectively controlled if action is taken early.
 “High strength steels used in landing gear and launch/ recovery systems are sensitive to pitting and stress corrosion cracking, which can lead to catastrophic failure. Aluminum alloys susceptible to exfoliation and intergranular corrosion are commonly found on wing skin and other load carrying structures. Even magnesium, one of the most corrosion sensitive metals known, is still used in canopy frames and gear boxes. Added to this is the ever increasing age of military aircrafts and the need to comply with stricter environmental regulations. All of these factors combine to make corrosion prevention and control a significant factor in the safe and economic operation of military aircrafts.”Industrial air pollution is highly corrosive. Volcanic ash is highly corrosive. The corrosion process is accelerated in hot environments.Other substances that contribute to this corrosive mix include industrial fluids and cleaning solutions, oils and fuels, battery acid, 
The age of the aircraft is also a significant factor. In recent years, progress has been made in the fight against corrosion, with the development of better corrosion-resistant base materials, protective surface treatments, and coatings (organic and inorganic primers) and the introduction of corrosion prevention measures into aeronautical engineering and manufacturing processes.But older aircrafts and in particularly those beyond their 20 year design life, are particularly vulnerable to corrosion, not only because they lack the newer anti-corrosive protections, but because of their total exposure over years and decades to the harsh environments and conditions that hasten the advance of corrosion. Even under ideal conditions, all aircrafts will experience some corrosion, but as an aircraft ages, corrosion is more likely to develop, and to be more extensive. Our Technical Engineering Office is to disposition for the technical consulting about to corrosion prevention measures.
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