鹽霧測試
鹽霧試驗是一種利用鹽霧試驗設備所創造的人工模擬鹽霧環境條件來確認產品或金屬材料耐腐蝕性能的環境試驗。試驗的嚴苛程度取決于曝露持續時間。
實驗室模擬鹽霧可以分為三類:中性鹽霧試驗、醋酸鹽霙試驗、銅鹽加速醋酸鹽霧試驗
（1) 中性鹽霧試驗(NSS試驗)是岀現最早目前應用領域最廣的一種加速腐蝕試驗方法。它采用5%的氯化鈉鹽水溶液,溶液PH值調在中性范圍(6.5~7.2)作為噴霧用的溶液。試驗溫度均取35°℃,要求鹽霧的沉降率在1~2m/2000px/h。
(2)醋酸鹽霧試驗(ASS試驗)是在中性鹽霧試驗的基礎上發展起來的。它是在5%氯化鈉溶液中加入一些冰醋酸,使溶液的PH值降為3左右,溶液變成酸性,最后形成的鹽霧也由中性鹽霧變成酸性。它的腐蝕速度要比NSS試驗快3倍左右。
(3)銅鹽加速醋酸鹽霧試驗(CASS試驗)是國外新近發展起來的一種快速鹽霧腐蝕試驗,試驗溫度為50℃C,鹽溶液中加入少量銅鹽氯化銅,強烈誘發腐蝕。它的腐蝕速度大約是NSS試驗的8倍左右。
參考的測試標準: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
試驗溫度范圍：+35～55℃
噴霧壓力：0.07～0.17MPa
濕度范圍： ≥95%RH
內部容積：250L
Test temperature range:+35 ～ 55 ℃
Spray pressure: 0.07~0.17MPa
Humidity range: ≥ 95% RH
Internal volume: 250L
試驗溫度范圍：+35～55℃
噴霧壓力：0.07～0.17MPa
濕度范圍： ≤85%RH
內箱尺寸：3000×2000×2800mm
開門尺寸：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
