[Guarantee Standardization] Corrosion prevention and control protocols and requirements in weapon equipment design standards

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Background

The US Department of Defense recognizes that corrosion prevention and control planning is the key and top priority to the success of the weapon equipment procurement plan. The United States Code requires mandatory implementation of corrosion prevention and control related directives, instructions and policy requirements. According to the policy of the Ministry of National Defense, Type I acquisition projects shall formally record the corrosion prevention and control plan in the system engineering plan and life cycle support plan. The project director shall formulate and implement a formal corrosion prevention and control plan to improve the availability and safety of the weapon system project and reduce the life-cycle cost of equipment.

In the 1990s, due to the cancellation of many corrosion prevention and control technical specifications and standards, it was difficult to incorporate corrosion prevention and control requirements in the procurement of weapon systems. Since many important technical specifications and standards no longer exist, hundreds of individual requirements from various channels need to be negotiated one by one in the contract. This has led to the need to negotiate hundreds of individual requirements from the following aspects in order to incorporate corrosion prevention and control requirements into weapon system procurement:

system surface treatment specifications

corrosion prevention and control verification and verification standards

aircraft structural integrity

prohibited materials

non-destructive testing

environmental testing

primers and coatings, surface treatment, metal, composite materials, adhesives, etc. hundreds of individual technical specifications

experience and lessons on old equipment

corrosion prevention and control risk management

corrosion prevention and control team

materials and processes Selection criteria.

Later, with the gradual restoration and upgrading of military standards, and the inclusion of new non-governmental standards in corrosion and control planning, it finally realized that five key standards were adopted to solve the problem of equipment corrosion prevention and control, replacing hundreds of previous ones. Separate request.

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Measures taken by the Maritime Systems Command

The Mission Operations and Integration Department of the Naval Aviation Systems Command, located at the McQuail Dix Lakehurst Joint Base in New Jersey, U.S., issued the system standardization and packaging, processing, storage and transportation division Two important military standards for corrosion prevention and control. The item

is "material and process requirements for aerospace weapon systems". This standard related to design standards stipulates the material and process requirements for aerospace weapon systems, provides timely and comprehensive limited material and process requirements and procedures for the system design process, and summarizes the experience of military special combat systems worldwide for many years lesson. The standard adopts military-specific design standards and considerations that exceed commercial design practices to meet the stringent military requirements and environments faced by combat systems. Using this file can make the system more durable in combat service. The second item of

is "Surface treatment, coating and sealant for the protection of aerospace weapon systems and support equipment." This standard stipulates the material specifications such as surface protection treatment, protective coating and sealant suitable for aerospace weapon systems and support equipment. The methods and materials in the standard are used for the protective surface treatment and finish of weapon system parts (including spare parts) and components (such as fuselage, wing, cover, wing and rotor, etc.). These standards constitute an important part of the corrosion prevention and control of U.S. military equipment. They specify the selection of materials, protective coatings and design considerations, and reduce corrosion by applying anti-corrosion principles. Consider anti-corrosion issues in the early stages of the procurement process, by balancing the procurement costs related to improvements in the initial product design, and by improving the design of weapon systems, effectively reducing the total cost of ownership and maintenance of military equipment, systems and facilities Repair fees. Although investments in corrosion prevention and control may increase equipment procurement costs, these costs will eventually be offset by reduced maintenance costs during the equipment life cycle. The two standards issued by

provide standard support for contract execution and provide reference for other military documents, technical manuals and joint service specifications. Corrosion prevention and control requirements are included in the initial design of equipment, and corrosion prevention and control verification is included as part of the equipment test and acceptance plan, which is applicable to aerospace weapon systems of all services. These two standards improve the safety, reliability, and maintainability of the Department of Defense’s aerospace weapon system. Improving corrosion prevention and control will ultimately reduce equipment downtime and improve mission readiness. The effect of

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In the acquisition of weapon systems, if an appropriate corrosion protection plan is not developed, the Ministry of Defense will pay a high price. The U.S. Department of Defense has about 2$10 billion is spent on repairs that need to be carried out due to corrosion, accounting for almost 25% of each maintenance cost. Half of these costs are related to the aerospace system of the Department of Defense. Corrosion reduces the level of combat readiness and safety of the equipment, and causes a lot of losses, and these losses can often be avoided by doing a good job of prevention.

The Task Force of the National Defense Science Council estimates that through appropriate investment in equipment design, manufacturing, and maintenance, strengthening equipment corrosion prevention and control, and implementing corrosion prevention and control standards, corrosion costs can be reduced by 30%. For the Department of Defense, it is expected to save or avoid $6 billion in costs each year. These two standards have been released and stored in the procurement streamlined and standardized information system database for institutions at all levels to quote and implement in weapon system procurement documents. Technical specification documents such as "Aircraft Pneumatic System, Design and Installation" and "Missile, Guidance, Structural Integrity" have already referred to the "Aerospace Weapon System Material and Process Requirements" standard. "Aircraft retouch coating", "engine, aircraft, turbine" and various other military materials technical specifications have also begun to implement the "protection of aerospace weapon systems and support equipment surface treatment, coatings and sealants" standards. Referencing these two design standards in military equipment technology can ensure the uniformity of material selection and the compatibility of coatings, and improve corrosion protection, prevention and control capabilities.

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Problems that need to be solved in the future

At present, there are still some challenges in the implementation of military standards. For example, to promote the implementation of standards, extensive coordination work is required. Some of them have gone beyond the scope of the Ministry of National Defense and have to cooperate with stakeholders. To coordinate related equipment support work, we must also strive for the extensive participation of corrosion prevention and control experts, project office directors, system engineers, equipment life cycle support personnel, contract signing units, cost estimation and budget personnel. Considering that many existing equipment and facilities follow different procedures, requirements and agreements, the implementation of standard clauses in the contract usually requires a large number of opinions of all parties to be determined, all disputes and differences are resolved, and negotiations with stakeholders are finally reached. All parties agreed.