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White Paper: Materials

Superior Corrosion Resistance for Automotive Applications: How NITREX SMART ONC Leads with Advanced Protection Technology

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Explore the latest groundbreaking advancements in corrosion resistance for the automotive industry and the economic and environmental impacts of corrosion. The revolutionary SMART ONC® and other Nitrex heat treatment technologies represent a significant leap forward, providing unparalleled corrosion resistance for automotive components. These technologies integrate innovative processes like controlled nitrocarburizing and controlled post-oxidizing, enhancing corrosion resistance while concurrently improving the durability and lifespan of automotive parts.

The paper showcases the effectiveness of SMART ONC® through rigorous testing scenarios, illustrating its versatility across various automotive parts, including brake rotors and engine components. Additionally, it delves into broader implications for cost savings and sustainability, positioning SMART ONC® as a crucial advancement in automotive part manufacturing, heralding a transformative step towards durability, resilience, and eco-friendly practices in the industry.


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Overview

The white paper on NITREX SMART ONC® emphasizes the critical issue of corrosion, which incurs an estimated cost of 3 to 4% of global GDP and significantly contributes to greenhouse gas emissions due to the steelmaking required for replacements. Effective corrosion management practices can mitigate these costs and environmental impacts.

The document highlights a study by NACE International, which revealed that the automotive industry saved $9.6 billion annually in 1999 compared to 1975 through high-level corrosion prevention decisions. Despite advancements, corrosion remains a persistent challenge, underscored by recent recalls in the industry.

The paper explains the corrosion process, particularly focusing on iron rusting, which occurs when iron reacts with oxygen and moisture, leading to the formation of rust. It details various methods for corrosion protection, including painting, powder coating, cathodic protection, and the use of corrosion inhibitors. These methods aim to shield iron-based alloys, such as carbon and low alloy steels, from corrosive elements.

A significant aspect of the paper is the discussion of salt spray testing, a standardized method (ASTM B117 or ISO 9227) used to evaluate corrosion resistance. This test involves exposing specimens to a saline environment to simulate corrosive conditions, allowing for the comparison of different materials and coatings. The results indicate varying levels of corrosion resistance, with some materials enduring extensive exposure without rust formation.

The NITREX SMART ONC® process is highlighted for its ability to enhance the wear and corrosion resistance of automotive components, such as gears and shafts, through nitriding. The paper concludes by emphasizing the importance of ongoing research and development in corrosion protection technologies to further reduce costs and improve material longevity in various industries.

Overall, the white paper serves as a comprehensive resource on the economic and environmental implications of corrosion, alongside innovative solutions for its management.