ASTM D4340 在排熱條件下發(fā)動機(jī)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(biāo)準(zhǔn)號ASTM D4340-2010

中文名 在排熱條件下發(fā)動機(jī)冷卻劑對鑄造鋁合金腐蝕性的標(biāo)準(zhǔn)試驗(yàn)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(shí)施日期

廢止日期無

中國標(biāo)準(zhǔn)分類號H25

國際標(biāo)準(zhǔn)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(jī)運(yùn)行期間，發(fā)動機(jī)冷卻液必須防止鋁氣缸蓋的傳熱腐蝕。形成的任何腐蝕產(chǎn)物都可能沉積在散熱器內(nèi)部表面，從而降低散熱器的傳熱效率。冷卻系統(tǒng)可能出現(xiàn)過熱和沸騰。


本試驗(yàn)方法提供了一種有選擇地篩選未使用的發(fā)動機(jī)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(jī)的冷卻液。然而，本試驗(yàn)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(yīng)使用模擬服務(wù)、測功機(jī)和車輛試驗(yàn)進(jìn)行更全面的評估，以確定冷卻劑的長期有效性。


1.1本試驗(yàn)方法包括一個(gè)實(shí)驗(yàn)室篩選程序，用于評估發(fā)動機(jī)冷卻液在鋁缸蓋發(fā)動機(jī)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(biāo)準(zhǔn)并非旨在解決與其使用相關(guān)的所有安全問題（如有）。本標(biāo)準(zhǔn)的使用者有責(zé)任在使用前建立適當(dāng)?shù)陌踩徒】祵?shí)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(yù)防說明。