什么是TOYOTA豐田試驗標準TSH1555G復雜環(huán)境下加速腐蝕試驗箱

Toyota TSH1555G復雜環(huán)境下加速腐蝕試驗標準：

Tsh1555g復合鹽霧試驗標準規(guī)定了包括車身等每個零件的加速腐蝕的再生產(chǎn)試驗方法，用于模擬實際車輛所產(chǎn)生的腐蝕。 TSH1555G標準的交變循環(huán)腐蝕測試是一個復雜的環(huán)境周期試驗，在實驗中，濕潤/干燥周期每天重復一次。對于該試驗，應使用下面介紹的的三種方法之一來進行。 

復合交變循環(huán)腐蝕試驗模式 

單周期試驗模式：

Toyota Laboratory Accelerated Cyclic Corrosion Test

This test procedure serves as a general purpose atmospheric corrosion test and can be applied to a wide variety of materials, coatings and interactions of materials.

It has been developed to allow the evaluation of the corrosion resistance of metals used in vehicle bodies where there is a significant influence of chloride ions, mainly as sodium chloride from winter road de-icing salt. This test is cyclic in nature, i.e.; test specimens are exposed to changing climates over time.

Test specimens are placed in an enclosed chamber and exposed to a changing climate.
 

The test comprises 3 alternative 24 hour single cycles, methods A, B and C.

Method A comprises 17 hours saltwater spraying, 3 hours forced drying, 2 hours saltwater dipping and finally 2 hours natural drying.

方法A 鹽霧噴霧（17H）→ 強制干燥（3H）→ 鹽水浸泡（2H）→ 自然干燥（2H）  

Method B comprises 1 hour saltwater spraying, 16 hours wetting, 4.5 hours forced drying, 1 hour saltwater dipping and finally 1,5 hours natural drying.

方法B 鹽霧噴霧（1H）→潤濕（16）→強制干燥（4.5H）→鹽水浸泡（1H）→自然干燥（1.5H） 

Method C comprises 4 hours saltwater spraying, 5 hours forced drying, 12 hours wetting, 2 hours forced drying and finally 1 hour natural drying.

方法C 鹽霧噴霧（4H）→強制干燥（5H）→潤濕（12H）→強制干燥（2H）→自然干燥（1H） 

The number of cycle repeats and therefore the test duration is variable.

This test is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT.
方法A、B、C均可以設(shè)定循環(huán)

TSH1555G交變循環(huán)腐蝕復合鹽霧試驗機滿足如下測試條件：

1、鹽霧試驗 

鹽水噴霧應按照TSH1552G周期試驗模式中所示的條件進行。在試驗期間，鹽水預熱器，加濕器和噴霧器內(nèi)的溫度應持續(xù)保持在50±1℃。 

2、鹽水浸泡 

在同樣的試驗箱內(nèi)，由鹽水儲備箱將鹽水通過水泵打入試驗箱內(nèi)，直到鹽水容量達到設(shè)定目標，保證樣測試產(chǎn)品*浸入。鹽溶液的溫度控制在50±1℃。

3、強制干燥 

在由前一個測試過程轉(zhuǎn)換到干燥階段時，電動排水閥會將試驗箱內(nèi)的水全部排空，風道內(nèi)有加熱器將循環(huán)風吹入到試驗箱內(nèi)，溫度控制60度，濕度在30%或更低一些。 

4、自然干燥 

將試樣保留在試驗箱內(nèi)進入自然干燥階段，在此試驗期間雖然沒有特殊的通風要求，建議是保持室溫在20-30℃ 。

5、潤濕試驗 

將試樣暴露在溫度50±1℃濕度85-90%條件下，加濕系統(tǒng)和加熱系統(tǒng)裝置工作保證測試進行的溫濕度要求。
 

KD-TSH1555G復合鹽霧試驗機技術(shù)規(guī)范：