壓力錶的塑膠接頭抗腐蝕程度
壓力錶或隔膜壓力錶因其測量原理，接頭會接觸到壓力源(介質)，對於帶有腐蝕性的流體，我們常選用塑膠接頭或隔膜的壓力錶。以下列常見的壓力錶塑膠材質對不同壓力源的耐腐蝕性
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符號說明：✓：完全耐用 ○：可使用 X：不建議使用 ⊗：部分情況不能，如高濃度或帶水氣 |
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PP |
PVC |
PVDF |
PTFE |
PFA |
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水蒸汽 |
H2O |
✓ |
✓ |
✓ |
✓ |
✓ |
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氫氣 |
H2 |
✓ |
✓ |
✓ |
✓ |
✓ |
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一氧化二氮 |
N2O |
✓ |
✓ |
✓ |
✓ |
✓ |
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過氧化氫 |
H2O2 |
○ |
✓ |
○ |
✓ |
✓ |
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酸 |
鹽酸 |
HCl |
✓ |
✓ |
✓ |
✓ |
✓ |
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硝酸 |
HNO3 |
○ |
✓ |
✓ |
✓ |
✓ |
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硫酸 |
H2SO4 |
○ |
✓ |
✓ |
✓ |
✓ |
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硫化氫 |
H2S |
✓ |
✓ |
✓ |
✓ |
✓ |
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碳酸 |
H2CO3 |
✓ |
✓ |
✓ |
✓ |
✓ |
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磷酸 |
H3PO4 |
✓ |
✓ |
✓ |
✓ |
✓ |
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鉻酸 |
H2CrO4 |
○ |
✓ |
○ |
✓ |
✓ |
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氫氟酸 |
HF |
○ |
○ |
✓ |
✓ |
✓ |
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氯酸 |
HClO3 |
○ |
✓ |
✓ |
✓ |
✓ |
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二氧化硫 |
SO2 |
✓ |
✓ |
✓ |
✓ |
✓ |
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鹼 |
氫氧化鈉 |
NaOH |
✓ |
✓ |
✓ |
✓ |
✓ |
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氨氣 |
NH3 |
- |
- |
- |
✓ |
✓ |
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鹽 |
硝酸銨 |
NH4NO3 |
✓ |
- |
✓ |
✓ |
✓ |
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硫酸銨 |
(NH4)2SO4 |
✓ |
✓ |
✓ |
✓ |
✓ |
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硫酸鋁 |
Al2 (SO4)3 |
✓ |
✓ |
✓ |
✓ |
✓ |
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硫酸鹽 |
Sulfate |
✓ |
✓ |
✓ |
✓ |
✓ |
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碳酸氫銨 |
NH4HCO3 |
✓ |
✓ |
✓ |
✓ |
✓ |
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碳酸鈉 |
Na2CO3 |
✓ |
✓ |
✓ |
✓ |
✓ |
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碳酸氫鈉 |
NaHCO3 |
○ |
✓ |
✓ |
✓ |
✓ |
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氯化銨 |
NH4CI |
✓ |
✓ |
✓ |
✓ |
✓ |
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氯化鉀 |
KCI |
✓ |
✓ |
✓ |
✓ |
✓ |
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氯化鐵 |
FeCl3 |
✓ |
✓ |
✓ |
✓ |
✓ |
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次氯酸鈉 |
NaOCl |
○ |
✓ |
✓ |
✓ |
✓ |
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水溶液 |
礦泉水 |
Mineral water |
✓ |
✓ |
✓ |
✓ |
✓ |
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汙水 |
Sewage |
✓ |
✓ |
✓ |
✓ |
✓ |
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滷水 |
Brines |
✓ |
✓ |
✓ |
✓ |
✓ |
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海水 |
30% NaCl |
✓ |
✓ |
✓ |
✓ |
✓ |
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啤酒 |
Beer |
✓ |
✓ |
✓ |
✓ |
✓ |
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果汁 |
Juice |
✓ |
✓ |
✓ |
✓ |
✓ |
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毒性 |
硫 |
Sulfur |
- |
- |
- |
✓ |
✓ |
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氯氣 |
Cl2 |
✓ |
✓ |
✓ |
✓ |
✓ |
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氯水 |
Chlorinated Water |
✓ |
✓ |
✓ |
✓ |
✓ |
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溴氣 |
Br2 |
X |
X |
⊗ |
✓ |
✓ |
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氧氯化碳 |
COCI2 |
✓ |
✓ |
✓ |
✓ |
✓ |
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有機 |
乙酸 |
CH3COOH |
✓ |
✓ |
✓ |
✓ |
✓ |
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乙酸銨 |
CH3COONH4 |
✓ |
- |
- |
✓ |
✓ |
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甘油 |
Glycerol |
✓ |
✓ |
✓ |
✓ |
✓ |
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二甲苯 |
C8H10 |
X |
X |
○ |
✓ |
✓ |
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甲醇 |
CH3OH |
○ |
✓ |
✓ |
✓ |
✓ |
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乙醇 |
C2H5OH |
○ |
✓ |
✓ |
✓ |
✓ |
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甲烷 |
CH4 |
✓ |
✓ |
✓ |
✓ |
✓ |
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二氯乙烯 |
C2H4CI2 |
X |
X |
✓ |
✓ |
✓ |
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三氯甲烷 |
CHCI3 |
X |
X |
✓ |
✓ |
✓ |
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三氯乙烯 |
C2HCI3 |
X |
X |
✓ |
✓ |
✓ |
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醋酸纖維素 |
cellulose acetate |
- |
- |
- |
✓ |
✓ |
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檸檬酸 |
C6H8O7 |
○ |
⊗ |
✓ |
✓ |
✓ |
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原油 |
Crude |
✓ |
✓ |
✓ |
✓ |
✓ |
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氟里昂 |
Freon |
✓ |
✓ |
✓ |
✓ |
✓ |
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