The influence of the quantity of polymeric binder in the sintering of commercially obtained iron powder was investigated. Hydrogen-reduced iron powder with grain sizes below 50 µm was mixed with spherical polystyrene dissolved in 5 cm³ of acetone. The resulting dough-like mixture was cast into a mold and subsequently dried at 37 °C. After drying, a two-phase firing process was carried out in a protective argon atmosphere. The fired samples were immersed in a 0.9% NaCl solution, and their corrosion current was continuously monitored. The use of polystyrene as a binder offers the advantage of maintaining a stable shape both after drying and firing. Dimensional stability is preserved. Three different quantities of polystyrene, namely 0.5 g, 1.0 g, and 1.5 g, were used. The amount of added polystyrene influenced both the microscopic structure and the measured corrosion current. This research highlights the significance of binder selection and quantity in achieving the desired properties of iron powder compacts, emphasizing the pivotal role played by polymeric binders in the powder metallurgy process.

Graphical abstract

中文翻译：

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铁中填料含量对腐蚀的影响

研究了聚合物粘合剂的量对市售铁粉烧结的影响。将粒径低于50μm的氢还原铁粉与溶解在5cm ³丙酮中的球形聚苯乙烯混合。将所得面团状混合物倒入模具中，随后在 37°C 下干燥。干燥后，在氩气保护气氛中进行两相烧制过程。将烧制后的样品浸入0.9% NaCl溶液中，连续监测其腐蚀电流。使用聚苯乙烯作为粘合剂具有在干燥和烧制后保持稳定形状的优点。保持尺寸稳定性。使用三种不同量的聚苯乙烯，即0.5g、1.0g和1.5g。聚苯乙烯的添加量影响微观结构和测量的腐蚀电流。这项研究强调了粘合剂选择和数量对于实现铁粉压块所需性能的重要性，强调了聚合物粘合剂在粉末冶金过程中发挥的关键作用。

图形概要