ASTM D4340 在排熱條件下發(fā)動機冷卻劑對鑄造鋁合金腐蝕性的測試方法

ASTM D4340-2010發(fā)行信息

標準號ASTM D4340-2010

中文名 在排熱條件下發(fā)動機冷卻劑對鑄造鋁合金腐蝕性的標準試驗方法

英文名Standard Test Method for Corrosion of Cast Aluminum Alloys in Engine Coolants Under Heat-Rejecting Conditions

發(fā)布日期2010

實施日期

廢止日期無

中國標準分類號H25

國際標準分類號77.120.10 (Aluminium and aluminium alloys)

發(fā)布單位US-ASTM

ASTM D4340-2010適用范圍

It is essential that engine coolants prevent heat-transfer corrosion of aluminum cylinder heads during engine operation. Any corrosion products formed may deposit on interior radiator surfaces, reducing heat-transfer efficiency of the radiator. Overheating and boil-over of the cooling system may then occur.

This test method provides a means for selectively screening unused engine coolants and will readily distinguish those coolants that are unsuitable for use with aluminum cylinder head engines. However, satisfactory performance of a coolant in this test method does not ensure adequate long-term service performance. Additional, more comprehensive evaluations with simulated service, dynamometer, and vehicle tests should be used to establish the long-term effectiveness of the coolant.

1.1 This test method covers a laboratory screening procedure for evaluating the effectiveness of engine coolants in combating corrosion of aluminum casting alloys under heat-transfer conditions that may be present in aluminum cylinder head engines.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Sections 11 and 12.

在發(fā)動機運行期間，發(fā)動機冷卻液必須防止鋁氣缸蓋的傳熱腐蝕。形成的任何腐蝕產物都可能沉積在散熱器內部表面，從而降低散熱器的傳熱效率。冷卻系統(tǒng)可能出現過熱和沸騰。


本試驗方法提供了一種有選擇地篩選未使用的發(fā)動機冷卻液的方法，并將很容易區(qū)分那些不適用于鋁缸蓋發(fā)動機的冷卻液。然而，本試驗方法中冷卻劑的令人滿意的性能不能確保足夠的長期使用性能。此外，應使用模擬服務、測功機和車輛試驗進行更全面的評估，以確定冷卻劑的長期有效性。


1.1本試驗方法包括一個實驗室篩選程序，用于評估發(fā)動機冷卻液在鋁缸蓋發(fā)動機可能存在的傳熱條件下防止鋁鑄造合金腐蝕的有效性。


1.2本標準并非旨在解決與其使用相關的所有安全問題（如有）。本標準的使用者有責任在使用前建立適當的安全和健康實踐，并確定監(jiān)管限制的適用性。第11節(jié)和第12節(jié)給出了具體的預防說明。