The engine is the heart of a vehicle and one of the most critical components that determine its overall performance and quality. However, the importance of rust prevention during both manufacturing and maintenance is often overlooked, leading to serious issues such as corrosion, reduced performance, and shortened lifespan—sometimes even resulting in scrapped parts. For engine manufacturers, addressing rust is not just a challenge but an essential requirement that cannot be ignored.
Corrosion in engines can stem from multiple factors, including the material design, anti-corrosion structure, and the quality of the manufacturing process. From the production standpoint, anti-rust protection is a crucial stage throughout the entire process. Applying effective anti-rust technology ensures that metal parts remain protected during manufacturing, which directly impacts the final assembly quality and long-term durability of the vehicle.
Engine rust prevention can be categorized into two main areas: part-level rust prevention and whole-engine rust prevention. In terms of the production sequence, it can be divided into three key stages: rust prevention between processes, during transportation, and at the final stage.
There are numerous methods for preventing rust, such as painting, using rust preventive oil, applying rust inhibitors, vacuum packaging, and gas phase corrosion protection. Choosing the right method that suits a specific situation can be quite challenging, as each has its own advantages and limitations.
Shenyang Anti-Rust Packaging Materials Co., Ltd. has accumulated extensive experience in engine rust prevention and has successfully handled many projects. Today, we'd like to share one of their real-world success stories to provide some valuable insights.
In 2005, a major engine factory in Shenyang produced 4G6 and 4A9 series engines with an annual output of 400,000 units, supplying over 20 domestic automakers. The engines were exported to countries like the U.S., Italy, Egypt, and Australia, gaining strong recognition in international markets.
However, despite its reputation, the factory faced severe corrosion issues that damaged its image. After visiting the site, Shenyang's technical team identified the root cause: residual water in the cooling system. Previously, the factory used tap water for hot testing, and the leftover water in the channels couldn't be fully drained, causing serious corrosion in the products.
Through scientific analysis and trial and error, Shenyang proposed a solution: injecting a water-based anti-rust solution after the test. This solution is a rust inhibitor that can be diluted with water, containing water-soluble anti-rust compounds, auxiliary agents, solvents, and water. It allows metal parts to proceed to the next stage without cleaning, significantly simplifying the process.
This water-based anti-rust solution effectively solved the corrosion problem in the cooling systems of the Shenyang Engine Manufacturing Company, ensuring product quality and customer satisfaction.
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