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    DIN EN ISO11997-1色漆和清漆抗循环腐蚀标准

    2018-11-24 10:42:15  来源:上海鼎徵仪器仪表设备





     

     

                                                       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

     

    2

    4

    60±2

    Dry20-30%

     

    3

    2

    50±2

    Wet95%RH or over

     

    4

    Go back to step 1

    This makes a total cycle time of 8h from step1 to step3

     

    Transtition timeie time allowed to reach the temperature and relative humidity specified for a condition after changing to that condition):

    From salt spray to drywithin 30min

    From dry to wetwithin 150 min

    From wet to salt spraywithin 30min

    The effect of the salt spray willin principlebe instaneous

    For details of drying-air flowsee 6.4

    NOTE  Set points and operational fluctuations can be listed either independently of each other or in the formatset 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 agreedrepeat 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

     

    2

    8

    40±2

    100%RH

    Water condensing on test panels

    3

    16

    23±2

    50±20%RH

     

    4

    8

    40±2

    100%RH

    Water condensing on test panels

    5

    16

    23±2

    50±20%RH

     

    6

    8

    40±2

    100%RH

    Water condensing on test panels

    7

    16

    23±2

    50±20%RH

     

    8

    8

    40±2

    100%RH

    Water condensing on test panels

    9

    16

    23±2

    50±20%RH

     

    10

    48

    23±2

    50±20%RH

     

    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 formatset 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 agreedrepeat 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

     

    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

     

    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

     

    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 formatset point±


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