SAE J1950 在試驗(yàn)場(chǎng)上的車(chē)輛腐蝕試驗(yàn)

適用范圍
The facilities used by domestic automotive manufacturers to provide accelerated corrosion aging of complete vehicles are described in general. The types of vehicles tested, general test methodology, and techniques used to determine test-to-field correlation are discussed. The different procedures used throughout the industry produce different results on various vehicle coatings, components, and systems. The key to successful interpretation of test results is a thorough understanding of the corrosion mechanisms involved and the effects of test limitations on these mechanisms. The purpose of this information report is to provide a general overview of some proving ground procedures and facilities used in the United States to evaluate the corrosion protection performance of vehicles. Because of limitations involved with any accelerated testing procedure, and despite the use of complete vehicles and attempts to make test environments all-inclusive, test results require knowledgeable interpretation. Proving grounds are, in effect, large laboratories. As with different laboratory test procedures, different test techniques will produce different results. Consideration of the various techniques and analysis tools discussed in the following sections may give the reader an understanding of the environments that vehicles must be designed to survive and may aid in the further development of accelerated corrosion tests.

概述了國(guó)內(nèi)汽車(chē)制造商用于加速整車(chē)腐蝕老化的設(shè)施。討論了試驗(yàn)車(chē)輛的類(lèi)型、一般試驗(yàn)方法以及用于確定試驗(yàn)與現(xiàn)場(chǎng)相關(guān)性的技術(shù)。整個(gè)行業(yè)使用的不同程序?qū)Ω鞣N車(chē)輛涂層、部件和系統(tǒng)產(chǎn)生不同的結(jié)果。成功解釋試驗(yàn)結(jié)果的關(guān)鍵是徹底了解所涉及的腐蝕機(jī)制以及試驗(yàn)限制對(duì)這些機(jī)制的影響。本信息報(bào)告的目的是對(duì)美國(guó)用于評(píng)估車(chē)輛防腐性能的一些試驗(yàn)場(chǎng)程序和設(shè)施進(jìn)行概述。由于任何加速試驗(yàn)程序都存在局限性，盡管使用了整車(chē)，并試圖使試驗(yàn)環(huán)境包羅萬(wàn)象，但試驗(yàn)結(jié)果需要有知識(shí)的解釋。事實(shí)上，試驗(yàn)場(chǎng)是大型實(shí)驗(yàn)室。正如不同的實(shí)驗(yàn)室測(cè)試程序一樣，不同的測(cè)試技術(shù)將產(chǎn)生不同的結(jié)果?？紤]以下章節(jié)中討論的各種技術(shù)和分析工具，可使讀者了解車(chē)輛必須設(shè)計(jì)為能夠生存的環(huán)境，并有助于加速腐蝕試驗(yàn)的進(jìn)一步發(fā)展。