EN ISO11997-1循环腐蚀试验标准（盐雾、干燥、潮湿）
Cycle A
C.1 Salt fog test solution
Prepare the spray solution as described in Clause 5 by dissolving sodium chloride in water to give a concentration of (50±10)g/l .The PH of the solution shall be in the range 6 to 7.
C.2 Cycle
Set up the cabinet to perform the following cycle.
Step | Time H | Temp℃ | Condition | Notes |
1 | 2 | 35±2 | Salt spray |
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2 | 4 | 60±2 | Dry：20-30% |
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3 | 2 | 50±2 | Wet：95%RH or over |
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4 | Go back to step 1 | This makes a total cycle time of 8h from step1 to step3 | ||
| Transtition time（ie time allowed to reach the temperature and relative humidity specified for a condition after changing to that condition）： | From salt spray to dry：within 30min From dry to wet：within 150 min From wet to salt spray：within 30min The effect of the salt spray will，in principle，be instaneous。 For details of drying-air flow，see 6.4 | ||
NOTE Set points and operational fluctuations can be listed either independently of each other or in the format：set point±operational fluctuations.The set point is the target condition for the sensor when used at the operational control point as programmed by the user.Operational fluctuations are deviations from the indicated set point at the control point indicated by the readout of the calibrated control sensor during equilibrium operation and do not include measurement uncertainty.At the operational control point , the user programmes that exat number . The operational fluctuations specified for that set point do not imply that the user is allowed to programme a set point higher or lower than the exact set point specified. | ||||
C3 Salt fog depsiton rate
The salt fog deposition rate shall be 1ml/h to 2ml/h,when the salt fog iscollected over a 24h period (see Clause 10)
C 4 Duration
Unless otherwise agreed，repeat the test cycle for 30 cycles(240h),60cycles(240h),90cycles(720h) or 180cycles(1440h)
Cycle B
C.1 Salt fog test solution
Prepare the spray solution as described in Clause 5 by dissolving sodium chloride in water to give a concentration of (50±10)g/l .The PH of the solution shall be in the range 6 to 7.
C.2 Cycle
Set up the cabinet to perform the following cycle.
Step | Time | Temp | Condition | notes |
1 | 24 | 35±2 | Salt fog |
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2 | 8 | 40±2 | 100%RH | Water condensing on test panels |
3 | 16 | 23±2 | （50±20）%RH |
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4 | 8 | 40±2 | 100%RH | Water condensing on test panels |
5 | 16 | 23±2 | （50±20）%RH |
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6 | 8 | 40±2 | 100%RH | Water condensing on test panels |
7 | 16 | 23±2 | （50±20）%RH |
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8 | 8 | 40±2 | 100%RH | Water condensing on test panels |
9 | 16 | 23±2 | （50±20）%RH |
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10 | 48 | 23±2 | （50±20）%RH |
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11 | Go back to step 1 | This makes the total cycle time 7 days from step1 to step10. | ||
NOTE Set points and operational fluctuations can be listed either independently of each other or in the format：set point±operational fluctuations.The set point is the target condition for the sensor when used at the operational control point as programmed by the user.Operational fluctuations are deviations from the indicated set point at the control point indicated by the readout of the calibrated control sensor during equilibrium operation and do not include measurement uncertainty.At the operational control point , the user programmes that exat number . The operational fluctuations specified for that set point do not imply that the user is allowed to programme a set point higher or lower than the exact set point specified. | ||||
C3 Salt fog depsiton rate
The salt fog deposition rate shall be 1ml/h to 2ml/h,when the salt fog iscollected over a 24h period (see Clause 10)
C 4 Duration
Unless otherwise agreed，repeat the test cycle for 840 h
Cycle C
C.1 Salt fog test solution
Prepare the spray solution as described in Clause 5 by dissolving sodium chloride in water to give a concentration of (0.31±0.01)g/l and (4.1±0.01)g/l respectively .The PH of the solution shall be in the range 6 to 7.
C.2 Cycle
Set up the cabinet to perform the following cycle.
Step | Time min | Temp ℃ | Condition | notes |
1 | 210 | 30±2 | Salt fog |
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2 | 210 | 40±2 | Dry | Drying-air purge(see 6.4) |
3 | 1470 | 40±2 | （75±15）%RH | One method of achieving this conditon is to alternate the dry and humid cycles for suitable(short)time periods to keep the RH between the limits specified |
4 | 102 | 30±2 | Dry | Drying-air purge(see 6.4) |
5 | 210 | 30±2 | Salt fog |
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6 | 378 | 30±2 | 90% to 100%RH | Water condensing on test panel |
7 | 180 | 35±2 | Dry | Drying-air purge(see 6.4) |
8 | 120 | 25±2 | Dry |
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9 | Go back to step 1 | This makes the total cycle time 48h from step1 to step8. | ||
NOTE Set points and operational fluctuations can be listed either independently of each other or in the format：set point±operational fluctuations.The set point is the target condition for the sensor when used at the operational control point as programmed by the user.Operational fluctuations are deviations from the indicated set point at the control point indicated by the readout of the calibrated control sensor during equilibrium operation and do not include measurement uncertainty.At the operational control point , the user programmes that exat number . The operational fluctuations specified for that set point do not imply that the user is allowed to programme a set point higher or lower than the exact set point specified. | ||||
C3 Salt fog depsiton rate
The salt fog deposition rate shall be 2ml/h to 4ml/h,when the salt fog iscollected over a 24h period (see Clause 10)
C 4 Duration
Unless otherwise agreed，repeat the test cycle for1000h
Cycle D
C.1 Salt fog test solution
Prepare the spray solution as described in Clause 5 by dissolving sodium chloride in water to give a concentration of (50±10)g/l .The PH of the solution shall be in the range 6 to 7.
C.2 Cycle
Set up the cabinet to perform the following cycle.
Step | Time H | Temp℃ | Condition | Notes |
1 | 0.5 | 30±2 | Salt spray |
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2 | 1.5 | 30±2 | Wet：（95±3）%RH |
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3 | 2 | 50±2 | Hot dry |
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4 | 2 | 30±2 | Warm dry |
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5 | Go back to step 1 | This makes a total cycle time of 6h from step1 to step4 | ||
| Transtition time（ie time allowed to reach the temperature and relative humidity specified for a condition after changing to that condition）： | From salt spray to wet：within 10min From wet to hot dry：within 15 min From hot dry to salt warm dry：within 30min From salt warm dry to salt spray：instaneous | ||
NOTE Set points and operational fluctuations can be listed either independently of each other or in the format：set point±operational fluctuations.The set point is the target condition for the sensor when used at the operational control point as programmed by the user.Operational fluctuations are deviations from the indicated set point at the control point indicated by the readout of the calibrated control sensor during equilibrium operation and do not include measurement uncertainty.At the operational control point , the user programmes that exat number . The operational fluctuations specified for that set point do not imply that the user is allowed to programme a set point higher or lower than the exact set point specified. | ||||
C3 Salt fog depsiton rate
The salt fog deposition rate shall be 1ml/h to 2ml/h,when the salt fog iscollected over a 24h period (see Clause 10)
C 4 Duration
Unless otherwise agreed，repeat the test cycle for 28 cycles(168h)
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