为了提高切削液的性能,在水基切削液中需添加油性剂、极压剂、防锈剂,表面活性剂等几种乃几十种添加剂。三乙醇胺是水基切削液中一种重要的添加剂。这里我们就讲讲三乙醇胺在水基切削液中的作用与应用。

In order to improve the performance of Cutting fluid, several or even dozens of additives such as oiliness agent, extreme pressure agent, antirust agent and surfactant should be added to the water-based Cutting fluid. Triethanolamine is an important additive in water-based Cutting fluid. Here we will talk about the role and application of Triethanolamine in water-based Cutting fluid.

三乙醇胺是由环氧乙烷与氨水反应生成,其精制品为无色粘稠状液体。吸湿性强,在空气中变为黄褐色。易溶于水和乙醇,微溶于乙-醚和苯。pH=8～8.5,不能随水蒸汽一起挥发。

Triethanolamine is produced by the reaction of ethylene oxide and ammonia, and its refined product is colorless viscous liquid. It has strong hygroscopicity and turns yellow brown in the air. Easily soluble in water and ethanol, slightly soluble in ethyl ether and benzene. PH=8-8.5, cannot evaporate with water vapor.

合成水溶性油性剂

Synthetic water-soluble oil based agent

目前,润滑性能比较好的油性剂大多是长碳链物质,这些物质大多是非水溶性的。要把它们添加在水基切削液中,必须在其分子链中引入亲水基团。三乙醇胺有三个-OH,水溶性好。通过控制原料配比,使三乙醇胺分子中一个OH与油性剂发生化学反应,可生成水溶性油性剂。

At present, most of the oil based agents with good lubrication performance are long carbon chain substances, which are mostly insoluble in water. To add them to water-based Cutting fluid, hydrophilic groups must be introduced into its molecular chain. Triethanolamine has three OH, which is well water-soluble. By controlling the ratio of raw materials, one OH in the molecule of Triethanolamine can react with the oiliness agent to produce water-soluble oiliness agent.

防锈剂

Rust inhibitor

三乙醇胺本身是一种水溶性防锈剂。单独使用它在短期内可有效防止钢铁生锈,一般使用浓度为0.5%～2%。三乙醇胺与苯乙醇胺、苯甲酸钠、硼砂、碳酸钠等水溶性防锈剂有协同防锈作用,复合使用可显著提高水基切削液防锈能力。但三乙醇胺对铜有腐蚀作用,添加0.05%～0.1%的苯并三氮唑能改善对铜的防腐性。油酸三乙醇胺也是一种防锈剂,它适用于黑色金属、铝合金的防锈。

Triethanolamine itself is a water-soluble rust inhibitor. It can effectively prevent steel from rusting in the short term when used alone, with a general concentration of 0.5% to 2%. Triethanolamine has synergistic antirust effect with Phenethyl alcohol amine, Sodium benzoate, borax, sodium carbonate and other water-soluble antirust agents, and the antirust ability of water-based Cutting fluid can be significantly improved by combined use. But Triethanolamine is corrosive to copper, and the addition of 0.05% ～ 0.1% benzotriazole can improve the corrosion resistance of copper. Oleic acid Triethanolamine is also a kind of rust inhibitor, which is suitable for rust prevention of Ferrous and aluminum alloy.

表面活性剂

surface active agent 

表面活性剂在水基切削液中起渗透、扩散、稳定、清洗作用,是合成切削液与乳状液必不可少的添加剂。三乙醇胺与脂肪酸可合成一种阴离子表面活性剂。不同配比、不同脂肪酸合成的表面活性剂其HLB值不同,可适合于不同水基切削液的需要。这些表面活性剂均有良好的乳化能力,若与非离子表面活性剂烷基酚聚氧乙烯醚或脂肪醇聚氧乙烯醚配合使用,乳化效果更佳。

Surfactant plays a role of penetration, diffusion, stability and cleaning in water-based Cutting fluid, and is an indispensable additive for the synthesis of Cutting fluid and emulsion. Triethanolamine and fatty acid can synthesize an anionic surfactant. Surfactants with different ratios and different Fatty acid synthesis have different HLB values, which can meet the needs of different water-based Cutting fluid. These surfactants have good emulsifying ability. If they are used together with non-ionic surfactant Alkylphenol polyoxyethylene ether or Fatty alcohol polyoxyethylene ether, the emulsifying effect will be better.

三乙醇胺本身也属于一种非离子表面活性剂,把它加入水中能显著降低水的表面张力。在水基切削液中添加三乙醇胺将有助于切削液浸润,渗透于被切削(磨削)界面上,从而能充分发挥水基切削液的冷却与清洗作用。更多相关事项就来我们网站http://chaonvhui.com咨询！

Triethanolamine itself is also a non-ionic surfactant. Adding it to water can significantly reduce the surface tension of water. Adding Triethanolamine to the water-based Cutting fluid will help the Cutting fluid soak and penetrate into the cutting (grinding) interface, thus giving full play to the cooling and cleaning role of water-based Cutting fluid. For more related matters, come to our website http://chaonvhui.com consulting service