Coupons

RH

C

Concentration

Time

Gas

Ref.

Silver

50%

22˚C

2.5 - 0.26 ppm

2.66 - 3.64 ppm

5 week

(OCS), H₂S, (SO₂)

[32]

Tin

80% - 90%

25˚C

10 - 22 ppm, 1.8 ppm

30 hours

SO₂, NO₂

[33]

Copper

40%

30˚C, 80˚C

50 ppb, 2 ppm

22-77 days

H₂S

[34]

Copper

75 ppb SO₂ + 120 ppb NO₂

(SO₂ + NO₂)

[35]

Lead

95%

22˚C

formic acid 160 ppb, acetic acid, 170 ppb, CO₂ 350 ppm

One, two and four weeks.

Acetic and formic acid vapors

[36]

Copper

70%

30˚C

10, 200, 10 ppb

4, 10 days

H₂S, NO₂, Cl₂

[37]

Copper

80%

25˚C

200 ppb SO₂, 200 ppb O₃. NO₂­ ppb

Mixture of NO₂, SO₂, O₃

[38]

Copper

65%

25˚C

325 μg/m⁻³

7 days

Vapor HNO₃

[39]

Copper

75%

25˚C

SO₂ 75, H₂S 50 (ppb)

Mixture of SO₂, H₂S

[40]

Copper

75%

25˚C

SO₂ 75, NO₂ 120 (ppb)

10, 30, 60 hour

Mixture of SO₂, NO₂

[41]

Copper, lead

54%, 75%

25˚C

0.04, 0.4, 4, ppmv

135 days

Formaldehyde, Acetic and formic acid

[42]

Copper

100%

30˚C

100, 200 and 300 (ppm)

21 days.

formic and acetic acid

[43]

Copper

65%

25˚C

126 (ppb)

2 weeks

HNO₃

[44]

Zinc

90%

30˚C

800, 800 + 800 (μg/m⁻³)

2 weeks

NO₂, NO₂ + SO₂

[45]

Copper

90%

25˚C

10 (ppm)

4 week

SO₂

[46]

Copper

70%

30˚C

476 ppb + 500 (ppb)

4 week

SO₂ + O₃

[47]

Steel

90%

25˚C

200 + 3000 (ppb)

4 week

NO₂ + SO₂

[48]

Copper

80%

25˚C

50 - 200 (ppb)

4 week

H₂S

[49]

Copper

70%, 90%

35˚C

200 and 800 (μg/m⁻³)

14, 21, 28 days

SO₂ + NO₂

[50]

Silver

50%, 90%

25˚C

500 ppb

24 h

O₃

[29]