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<p>This study evaluates the suitability of different analytical methods for classifying sulfur-containing extreme pressure (EP) additives and their precursors. These methods fall into three categories: basic analytical tests, specific chemical analyses, and functional performance evaluations. These approaches are essential for evaluating the suitability of raw materials and the effectiveness of synthesized sulfurized additives. Basic analytical methods, such as measuring density and viscosity, provide preliminary insights into the physical properties of raw materials and synthesized products. Specific analyses of total and active sulfur content provide detailed compositional information and help predict additive performance. Functional tests, such as four-ball weld load and wear scar diameter assessments, evaluate the operational efficacy of the additives in lubrication scenarios. The findings highlight that the choice of raw materials and the optimization of synthesis parameters significantly influence the performance of the resulting EP additives. This comprehensive evaluation enables more efficient classification and synthesis of high-performance additives for industrial applications.</p>

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Evaluation of Analytical Methods Applicable for the Classification of Sulfur-Containing EP Additives and Their Raw Materials

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月8日

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  • Roland Nagy,
  • Gábor Zoltán Nagy,
  • Ditta Adrienn Gerbovits

摘要

This study evaluates the suitability of different analytical methods for classifying sulfur-containing extreme pressure (EP) additives and their precursors. These methods fall into three categories: basic analytical tests, specific chemical analyses, and functional performance evaluations. These approaches are essential for evaluating the suitability of raw materials and the effectiveness of synthesized sulfurized additives. Basic analytical methods, such as measuring density and viscosity, provide preliminary insights into the physical properties of raw materials and synthesized products. Specific analyses of total and active sulfur content provide detailed compositional information and help predict additive performance. Functional tests, such as four-ball weld load and wear scar diameter assessments, evaluate the operational efficacy of the additives in lubrication scenarios. The findings highlight that the choice of raw materials and the optimization of synthesis parameters significantly influence the performance of the resulting EP additives. This comprehensive evaluation enables more efficient classification and synthesis of high-performance additives for industrial applications.