盐雾测试

  盐雾试验是一种利用盐雾试验设备所创造的人工模拟盐雾环境条件来确认产品或金属材料耐腐蚀性能的环境试验。试验的严苛程度取决于曝露持续时间。

实验室模拟盐雾可以分为三类:中性盐雾试验、醋酸盐霙试验、铜盐加速醋酸盐雾试验

（1) 中性盐雾试验(NSS试验)是岀现最早目前应用领域最广的一种加速腐蚀试验方法。它采用5%的氯化钠盐水溶液,溶液PH值调在中性范围(6.5~7.2)作为喷雾用的溶液。试验温度均取35°℃,要求盐雾的沉降率在1~2m/2000px/h。

(2)醋酸盐雾试验(ASS试验)是在中性盐雾试验的基础上发展起来的。它是在5%氯化钠溶液中加入一些冰醋酸,使溶液的PH值降为3左右,溶液变成酸性,最后形成的盐雾也由中性盐雾变成酸性。它的腐蚀速度要比NSS试验快3倍左右。

(3)铜盐加速醋酸盐雾试验(CASS试验)是国外新近发展起来的一种快速盐雾腐蚀试验,试验温度为50℃C,盐溶液中加入少量铜盐氯化铜,强烈诱发腐蚀。它的腐蚀速度大约是NSS试验的8倍左右。

参考的测试标准:GB/T 2423.17, IEC60068-2-11, ISO 9227,  GB/T 10125, ISO4628-3, JIS-Z2371, JIS-G3141, GJB 150.1, MIL-STD-810F, MIL-STD-883E等

Salt spray test

Salt spray test is an environmental test that uses artificial simulated salt spray environmental conditions created by salt spray test equipment to confirm the corrosion resistance of products or metal materials. The severity of the test depends on the duration of exposure.

Laboratory simulated salt spray can be divided into three categories: neutral salt spray test, acetate spray test and copper salt accelerated acetate spray test

(1) Neutral salt spray test (NSS test) is the earliest and most widely used accelerated corrosion test method. It uses 5% sodium chloride saline solution, and the solution PH value is adjusted in the neutral range (6.5~7.2) as the solution for spray. The test temperature is 35 ° C, and the settling rate of salt spray is required to be 1~2m/2000px/h.

(2) The acetate spray test (ASS test) was developed on the basis of neutral salt spray test. It is to add some glacial acetic acid into the 5% sodium chloride solution to reduce the pH value of the solution to about 3, so that the solution becomes acidic, and the finally formed salt mist also becomes acidic from the neutral salt mist. Its corrosion rate is about 3 times faster than that of NSS test.

(3) The copper salt accelerated acetate spray test (CASS test) is a kind of fast salt spray corrosion test developed recently abroad. The test temperature is 50 ℃. A small amount of copper salt, copper chloride, is added to the salt solution to strongly induce corrosion. Its corrosion rate is about 8 times that of NSS test.

Reference test standards: GB/T 2423.17, IEC60068-2-11, ISO 9227, GB/T 10125, ISO4628-3, JIS-Z2371, JIS-G3141, GJB 150.1, MIL-STD-810F, MIL-STD-883E, etc

试验温度范围：+35～55℃

喷雾压力：0.07～0.17MPa

湿度范围： ≥95%RH

内部容积：250L

Test temperature range:+35 ～ 55 ℃

Spray pressure: 0.07~0.17MPa

Humidity range: ≥ 95% RH

Internal volume: 250L

试验温度范围：+35～55℃

喷雾压力：0.07～0.17MPa

湿度范围： ≤85%RH

内箱尺寸：3000×2000×2800mm

开门尺寸：2000×2500 mm

Test temperature range:+35 ～ 55 ℃

Spray pressure: 0.07~0.17MPa

Humidity range: ≤ 85% RH

Inner box size: 3000 × 2000 × 2800mm

Door opening size: 2000 × 2500 mm