5、漆膜倾向是否可以反映油的劣化程度？该指标如何测定？C a n V P R r e p r e s e n t t h e d e g r e e o f E H C o i l d e g r a d a t i o n?
H o w t o p e r f o r m t h e t e s t?
Not usually. We have developed the interpretation guideline for mineral oils. MPC (or VPR) is quite effective at detecting micro-dieseling and the products produced in this process. We recommend the following guideline to use in establishing condemning limits for an EHC system.
Test Method Suggested Target Suggested Warning
Level
Viscosity (cSt) 粘度 D445 38.4 – 44.2 +/‐ 10% initial Specific Gravity (g/ml) 比重 D792 1.12 1.17 Color 颜色 D1500 1.5 3
Water Content (ppm) 水含量 D6304 <500 800
Acid Number (mg KOH/g) 酸值 D974 0.05 0.10 Chloride (ppm) 氯含量 N/A 10 max 50 RULER (RULER Number) RULER值 D6971 <400 >650 Resistivity (Gohm∙cm) 电阻率 D1169 >5 5
ISO Particle Count 清洁度 ISO 4406 13/10 15/12 Mineral Oil (%) 矿物油 D02.CS96 <0.5 0.5 Patch Test (color) 膜片测试（颜色） D2276 <B2 B3
Auto Ignition Temp (ºC) 自燃点 D2155 566 566 Foaming (tend./stab. (ml) 泡沫特性 D892 10/nil 50/nil Total Metal Content (ppm) 总金属量 D5185 0 3
Flash Point (ºC) 闪点 D92 235 235
Air Release Time (min) 空气的释放值 D3427 <5 7
6、影响抗燃油空气释放值的因素有哪些？空气释放值为什么会超标？超标的影响？特别是对伺服阀造成什么影响？如何改善抗燃油空气释放值？
W h a t w i l l i n f l u e n c e t h e a i r r e l e a s e p r o p e r t y o f t h e E C H o i l? W h y w o u l d t h e a i r r e l e a s e b e o u t o f l i m i t? W h a t i s t h e i m p a c t o f o u t o f l i m i t, e s p e c i a l l y t h e i m p a c t t o t h e s e r v o v a l v e? H o w t o i m p r o v e a i r r e l e a s e?
Metallic salts and acids will impact air release. This creates an autocatalytic cycle causing more and more fluid degradation.。