ASTM 國際發(fā)動機(jī)冷卻液和相關(guān)液體委員會 (D15) 推出了一種新的測試方法 ASTM D8567，用于測定發(fā)動機(jī)冷卻液中常見的有機(jī)添加劑。該標(biāo)準(zhǔn)采用高效液相色譜 (HPLC) 來分析影響冷卻液性能的唑類和有機(jī)酸。

　　唑類是一類有機(jī)化合物，其特征是含有至少一個(gè)氮原子的五元環(huán)結(jié)構(gòu)。在發(fā)動機(jī)冷卻液中，唑類可形成保護(hù)層，幫助保護(hù)金屬表面（如銅和黃銅）免受腐蝕，從而提高冷卻液的使用壽命和性能。

　　有機(jī)酸是一類具有酸性的有機(jī)化合物。有機(jī)酸在各種生物和化學(xué)過程中發(fā)揮著重要作用，包括生物體內(nèi)的代謝途徑、食品保存，以及作為發(fā)動機(jī)冷卻液等產(chǎn)品的添加劑，有助于防止腐蝕和保持冷卻液的穩(wěn)定性。

　　延長壽命冷卻劑小組委員會主席亨利·奧烏蘇 (Henry Owusu) 強(qiáng)調(diào)了新標(biāo)準(zhǔn)的三大主要優(yōu)勢：降低有機(jī)添加劑技術(shù) (OAT) 冷卻劑分析成本、提高添加劑特性精度、提供明確的數(shù)據(jù)以區(qū)分 OEM 工廠填充和推薦的基于 OAT 的冷卻劑與售后替代品。

　　該標(biāo)準(zhǔn)將使車隊(duì)運(yùn)營、條件監(jiān)測分析師以及專門從事冷卻劑分析服務(wù)的實(shí)驗(yàn)室受益，并根據(jù)聯(lián)合國可持續(xù)發(fā)展目標(biāo)第 12 號關(guān)于負(fù)責(zé)任消費(fèi)和生產(chǎn)的倡議為負(fù)責(zé)任的消費(fèi)和生產(chǎn)做出貢獻(xiàn)。

　　New ASTM standard enhances engine coolant analysis

　　ASTM International’s engine coolants and related fluids committee (D15) has introduced a new test method, ASTM D8567, to determine common organic additives in engine coolants. The standard employs high-performance liquid chromatography (HPLC) to analyse azoles and organic acids, which impact coolant performance.

　　Azoles are a class of organic compounds characterized by a five-membered ring structure containing at least one nitrogen atom. In engine coolants, azoles help protect metal surfaces, such as copper and brass, from corrosion by forming a protective layer, thereby enhancing the longevity and performance of the coolant.

　　Organic acids are a group of organic compounds that possess acidic properties. Organic acids play significant roles in various biological and chemical processes, including metabolic pathways in living organisms, food preservation, and as additives in products like engine coolants, where they help in preventing corrosion and maintaining the stability of the coolant.

　　Henry Owusu, chair of the extended life coolants subcommittee, highlights three key benefits of the new standard: reducing costs for organic additive technology (OAT) coolant analysis, improving additive characterisation precision, and providing definitive data to distinguish OEM factory fill and recommended OAT-based coolants from aftermarket alternatives.

　　This standard will benefit fleet operations, conditional monitoring analysts, and laboratories specialising in coolant analysis services, contributing to responsible consumption and production as per the United Nations Sustainable Development Goal #12 on responsible consumption and production.