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技术文章
DIN EN ISO11997-1色漆和清漆抗循环腐蚀标准
2018-11-24
DIN EN ISO11997-1色漆和清漆抗循环腐蚀标准
色漆和清漆.耐周期性腐蚀的测定.第1部分:湿(盐雾)/干燥/湿度影响试验

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L24

L7

 

 

                                                   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

 

 

 

 ECS2017_3
 

 

 

 

 

 

                                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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