Corrosive Agents:

  • Corrosive materials are grouped into the general categories of solvents acids, alkalis (bases), and sunlight/weathering.
  • Stainless steel sensor housing is the best choice for all applications except those involving acids.
  • Thermoplastic polyester housings offer great resistance to all acids.(Fiber Optics should be considered when using corrosive materials)

View Next Article Moisture Considerations 

Housing MaterialIndustrial SolventsDilute AcidsConcentrated AcidsDilute Caustic AlkalisConcentrated Caustic Alkalis10% Sodium Hydroxide in SteamSunlight and Weathering
Thermoplastic Polyester 3 1 2 4 4 4 2
Polycarbonate 4 2 3 4 4 4 2
Polyphenylene oxide(PPO) 3 2 3 1 2 2 1
Acetal 2 3 4 3 4 3 2
Epoxy-coated zinc-aluminum alloy 2 2 3 2 3 3 1
Anodized Aluminum 1 3 4 2 3 3 2
Stainless Steel 1 3 4 1 2 2 2
PVC(polyvinal-chlorine) 3 2 3 1 1 1 2
Polyethylene 3 1 1 2 2 2 4
ABS 4 2 4 2 2 2 2
Lens MaterialIndustrial SolventsDilute AcidsConcentrated AcidsDilute Caustic AlkalisConcentrated Caustic Alkalis10% Sodium Hydroxide in SteamSunlight and Weathering
Glass 1 2 3 1 2 2 1
Acrylic 4 3 4 2 3 3 2
Polysufone 3 3 4 3 4 4 4
Polycarbonate 4 2 3 4 4 4 2
 Rating% Retention to StrengthDegree of Attack
1 Excellent 85% to 100% Slight (or no) attack
2 Good 75% to 84% Moderate attack
3 Fair 50% to 74% Noticeable swelling sofening, etching or corrosion
4 Poor <50% Severe degradation