Measuring pH on metallic planar surface

Click For Summary
SUMMARY

This discussion focuses on measuring pH levels on metallic planar surfaces, particularly in the context of corrosion studies. Participants explore the feasibility of using sensor probes on both dry and wet surfaces, emphasizing the need for precision in measurements. Recommendations include using indicators in conjunction with a spectrophotometer for prolonged use, with the choice of indicator dependent on the specific pH range of interest. The conversation highlights the importance of selecting appropriate tools for accurate pH measurement in challenging environments.

PREREQUISITES
  • Understanding of pH measurement techniques
  • Familiarity with spectrophotometry
  • Knowledge of corrosion science
  • Experience with chemical indicators
NEXT STEPS
  • Research suitable pH sensor probes for metallic surfaces
  • Explore long-term chemical indicators for pH measurement
  • Learn about the principles of spectrophotometry in pH analysis
  • Investigate the effects of protective layers on pH readings
USEFUL FOR

Researchers in materials science, corrosion engineers, and laboratory technicians involved in pH measurement and analysis on metallic surfaces.

Patrick Rota
Messages
3
Reaction score
0
We are currently trying to measure pH levels on the (wet) surface of metals as part of a study about corrosion.
The surface may have a non-conductive protective layer.

- is it feasible to measure pH on a planar surface (dry or wet)? Which kind of sensor probe can be used for this task?
- which order of magnitude will be the measure? (precision of the sensor)

Any advice would be greatly appreciated!
 
Chemistry news on Phys.org
My first thought would be to use and indicator in combination with a spectrophotometer.
 
Thank you DrDu, this is a great idea, indeed.
Can you recommend some indicator? Do you have suggestions?
EDIT: we need an indicator for prolonged use (years), if it exists
 
Last edited:
The choice of the indicator will depend on the pH range you are interested in.
 
Dear DrDu, thank you for your insight. Let me find out what is the pH forecast range.
 

Similar threads

Understand pH Meter Functioning: An Electric Potential Difference
  • · Replies 8 ·
Replies
8
Views
4K
What is deposit on palladium electrode?
  • · Replies 2 ·
Replies
2
Views
2K
Surface oxidation of aluminum alloy and electrical continuity
  • · Replies 16 ·
Replies
16
Views
5K
Why does the top surface of a Silicon Die measure close to 0 ohms?
  • · Replies 5 ·
Replies
5
Views
1K
Chemically regenerating my auto's catalytic converter?
  • · Replies 19 ·
Replies
19
Views
8K
Undergrad What Key Issues Should Cosmologists Address in the ΛCDM Model?
  • · Replies 1 ·
Replies
1
Views
3K
Recovery/development of low grade copper ore
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Help with sample size to measure Form Error of a round metal part
  • · Replies 4 ·
Replies
4
Views
2K
I need help, please, designing a pool sensor for breaking . . .
  • · Replies 2 ·
Replies
2
Views
711
Homebrewing beer and galvanic corrosion
  • · Replies 3 ·
Replies
3
Views
4K