CST900A Constant Coulomb Corrosion Tester
- PRODUCT DETAIL
CST900A Constant Coulomb Corrosion Tester
Product Introduction
The
CST900A Constant Coulomb Corrosion Tester is a portable instrument designed for
on-site corrosion monitoring and corrosion rate assessment. It supports manual
measurements as well as scheduled automatic data collection, making it suitable
for both field inspections and long-term corrosion monitoring.
With
an input impedance of 1 × 10¹² Ω, the instrument measures corrosion potential
(Ecorr) and polarization resistance (Rp), and provides corrosion rate
measurement over a specified range. Its built-in calendar clock and flash
memory can store up to 4,000 measurement records.
The
CST900A features an RS232 communication interface for transferring measurement
data to a PC. Dedicated software can process and graphically display parameters
such as medium resistance, polarization resistance, and corrosion rate, helping
users evaluate corrosion conditions and monitor corrosion control performance.
Performance Features
• Portable design: Lightweight
2 kg instrument for convenient transportation and field operation.
• Manual
and automatic measurement: Supports manual testing and scheduled
automatic measurements.
• Timed
data collection: Users can set measurement intervals from 1 to 100 hours.
• Large data storage: Built-in
flash memory stores up to 4,000 measurement records.
• High
input impedance: Input impedance of 1 × 10¹² Ω supports high-impedance
electrochemical measurements.
• Corrosion
parameter analysis: Measures Ecorr and Rp and provides corrosion
rate measurement.
• PC
data processing: RS232 communication enables data transfer to dedicated PC
software for graphical analysis.
• Built-in real-time
clock: Calendar clock supports scheduled measurements, with a specified annual error
of ±1 minute.
• Rechargeable
power supply: Operates using four NiMH rechargeable batteries.
Working Principle
The
CST900A uses electrochemical measurement techniques to evaluate corrosion
conditions in metallic structures and related environments.
It
measures the corrosion potential (Ecorr) and polarization resistance (Rp),
which are important parameters for assessing electrochemical corrosion
behavior. The instrument also provides corrosion rate measurement within its
specified range.
For
continuous field monitoring, users can configure the measurement interval from
1 to 100 hours. The built-in clock controls scheduled data collection, while
the internal memory stores up to 4,000 records.
Measurement
data can be transferred through the RS232 interface to a computer. Dedicated
software processes the data and presents parameters such as medium resistance,
polarization resistance, and corrosion rate in graphical form.
Technical Parameters
Parameter
Specification
Input
Impedance
1
× 10¹² Ω
Corrosion
Potential (Ecorr) Range
±2500
mV
Corrosion
Rate Measurement Range
1
× 10⁻⁴ to 10 mm/year
Absolute
Measurement Accuracy
±5%
(source notation requires confirmation)
Polarization
Resistance (Rp) Range
20
Ω to 1 MΩ
Real-Time
Clock Error
±1
minute/year
Automatic
Measurement Interval
1–100
hours
Data
Storage Capacity
Up
to 4,000 records
Communication
Interface
RS232
Power
Supply
4
rechargeable NiMH batteries
Instrument
Weight
2
kg
Operating
Temperature
-10
to 50°C
Relative
Humidity
≤80%
RH
Application Scenarios
The
CST900A is designed for corrosion monitoring in infrastructure, industrial
water systems, and field environments.
• Marine infrastructure: On-site
corrosion monitoring of ocean piers and other marine concrete structures.
• Bridge construction: Monitoring
corrosion conditions in reinforced concrete bridge structures.
• Concrete engineering: Evaluating
corrosion behavior in concrete structures and supporting corrosion protection
assessment.
• Industrial
cooling water systems: Monitoring corrosion in plant water systems
and cooling water circuits.
• Underground
pipelines: Conducting field inspections and monitoring corrosion rates in buried pipeline
systems.
• Industrial
corrosion control: Collecting corrosion data to support
maintenance planning and corrosion prevention strategies.
Comparison: CST900A Corrosion Tester vs. Conventional
Corrosion Inspection Methods
Comparison Item
CST900A
Conventional Coupon-Based Inspection
Measurement
Approach
Electrochemical
measurement
Physical
coupon exposure and subsequent evaluation
Corrosion
Parameters
Ecorr,
Rp, and corrosion rate
Corrosion
information derived from coupon condition or mass loss
Measurement
Operation
Manual
or scheduled automatic measurement
Requires
coupon exposure and retrieval
Data
Collection
Timed
automatic collection
Periodic
sampling and laboratory analysis
Data
Storage
Up
to 4,000 records
Depends
on record-keeping method
Data
Analysis
RS232
transfer and PC graphical analysis
Usually
requires separate data processing
Field
Application
Portable,
2 kg instrument
Requires
coupon installation and retrieval
Monitoring
Use
Supports
repeated on-site measurements
Provides
information over the coupon exposure period
Frequently Asked Questions
1. What is the CST900A Constant Coulomb Corrosion Tester
used for?
The
CST900A is used for on-site corrosion monitoring and corrosion rate assessment.
Typical applications include marine piers, bridges, concrete structures,
industrial cooling water systems, and underground pipelines.
2. What corrosion parameters can the CST900A measure?
The
instrument measures corrosion potential (Ecorr) and polarization resistance
(Rp), and provides corrosion rate measurement. Its PC software can also display
medium resistance and other processed measurement data.
3. Does the CST900A support automatic corrosion monitoring?
Yes.
Users can configure automatic measurement intervals from 1 to 100 hours. The
built-in real-time clock controls scheduled data collection.
4. How many measurement records can the instrument store?
The
built-in flash memory can store up to 4,000 measurement records.
5. Can measurement data be analyzed on a computer?
Yes.
The CST900A uses an RS232 communication interface to transfer measurement data
to a PC. Dedicated software can process and graphically display
corrosion-related parameters.
6. What is the corrosion rate measurement range?
The
specified corrosion rate range is 1 × 10⁻⁴ to 10 mm/year.
7. Is the CST900A suitable for field measurements?
Yes.
Its portable 2 kg design, rechargeable NiMH battery supply, manual measurement
function, and automatic timed measurement capability make it suitable for field
inspections and monitoring.
8. What are the operating environmental conditions?
The
specified operating temperature is -10 to 50°C, with relative humidity of 80%
RH or less.
