CETP 实验室大气循环腐蚀盐雾标准试验箱

CETP 实验室大气循环腐蚀盐雾标准试验箱

Fig. 4 Example of open and well drained fixtures for flat test panels (left) and minimum recommended stacking distance of panels (right)
图4 适用于平板试样的开放且排水畅通的夹具（左图）；建议至小板间距（右图）


Duration of test: The number of test cycles shall be determined by the specification covering the component or object being tested. When not specified, the test period shall be agreed by the requester and the corrosion department.
试验持续时间：试验循环次数应由试样零部件或试样相关要求决定。如果没有要求，应由申请试验的一方和负责研究腐蚀的部门商定试验周期。

Control before test start: Run and monitor the test cycle at least a 24 h period before starting the test, provided not already in continuous operation.
试验开始前的控制：假如持续运行尚未开始，在试验开始之前先运行并监控试验循环至少24小时。

Start and end time of test: The test is only allowed to be started just before the first precipitation (Table I Step1A) in the weekly scheme, at the end of the "weekend" constant temperature/humidity phase. The test is ended at the end of the weekend humidity exposure.
试验的启动时间和结束时间：本试验只允许在一周计划中的一次喷洒（见表1，步骤1A）之前启动，即“周末"恒温恒湿阶段结束时。试验在周末加湿曝露阶段结束。

TEST EXPOSURE CONDITIONS 试验曝露条件
There are three basic exposure modes in the daily test scheme:
每日试验计划分三种基本曝露模式：

1. A continuous wet phase at 25± 2°C where the test objects are exposed to a % NaCl solution. The wet condition is maintained by intermittent spray exposure and with a temperature control without drying, or with the humidity control set high enough to not cause any practical drying.
1. 25± 2°C持续湿润阶段，在此阶段试样曝露到%的氯化钠溶液中。通过间歇喷洒曝露和温度控制（不干燥），或调节湿度控制（足以防止物体干燥），试样的湿润状态得以保持。

2. A two-step transition from wet to controlled humidity climate.
2. 从湿润到受控湿度环境的两步过渡。

3. A period under constant temperature/ humidity control; 50 ± °C and 70± 3% RH. This is also the condition during weekend.
3.恒温恒湿控制周期：50 ± °C，70± 3% RH。这也是周末的环境状态。

Table 1. Climate program, step by step in automated mode
表1 环境表，自动模式的各个步骤