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引用第19楼lynn305于2007-06-22 17:03发表的 :
# a. d, T+ L6 v& R0 ?% X" A一般是用一种叫“菊花介指”的东东垫在接地螺丝和金属外壳之间,既可以切入油漆里,达到良好接触,也可以起到加固的作用。" y1 f, n# K" j3 Q2 ^8 U! ~7 {
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另外请问一下,什么是“外壳和螺丝、垫片之间的“电化学电位”???望BARRY指教。
% C) o& t( M. M以下引自 EN 60950-1 -2006. x8 k2 B; d& K
3 a# `6 Q6 T2 Z2.6.5.6 Corrosion resistance
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Conductive parts in contact at protective earthing terminals and connections shall not be subject to significant corrosion due to electrochemical action in any working, storage or transport environment conditions as specified in the instructions supplied with the equipment Combinations above the line in Annex J shall be avoided. Corrosion resistance can be achieved by a suitable plating or coating process.
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Compliance is checked by inspection and by reference to the table of electrochemical potentials (Annex J). |
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