Table of Contents
Related Manuals for Metal Samples MS1000
Summary of Contents for Metal Samples MS1000
- Page 1 MS1000 Corrosion Meter Owner’s Manual Metal Samples A Division of Alabama Specialty Products, Inc. 152 Metal Samples Rd., Munford, AL 36268 Phone: (256) 358-4202 Fax: (256) 358-4515 E-mail: msc@alspi.com Internet: www.metalsamples.com...
-
Page 3: Table Of Contents
Table of Contents Introduction ..............1 A. Background ..............1 B. Instrument Capabilities ........... 2 C. Applications for the MS1000 ......... 6 MS1000 Specifications and Features ......7 III. MS1000 Operation ............9 A. Test Readings ..............9 B. Data Acquisition ............. 9 1. -
Page 5: Introduction
In addition to using this instrument to monitor corrosion rates, corrosion engineers can also use the MS1000 to monitor inhibitor effectiveness, identity process upsets, identify localized corrosion events, and evaluate corrective actions in real time. -
Page 6: Instrument Capabilities
The method used by the MS1000 for calculating the corrosion rate is as follows. A low amplitude dc voltage is applied across the electrodes and then the resulting current, normalized to current density, is mea- sured. - Page 7 where E is the polarization from the open circuit potential of the electrodes and i is the measured current density at E. Stern and Geary showed that there is a linear relationship between potential and applied current at potentials only slightly removed from the corrosion potential.
- Page 8 The instrument is programmed for electrodes with surface areas of five . Multiplication factors are also included for flush mount electrodes with surface areas of 0.5 cm Zero Resistance Ammeter (ZRA) and Equivalent Pitting Rate A high precision zero resistance ammeter is used for monitoring the short-circuit current between electrodes.
- Page 9 corrosion rate, designated as the equivalent pitting rate, based on the ZRA. This equivalent pitting rate is defined as: K’ • W EPR = A • t • where EPR is the equivalent pitting rate in mpy, K’ is a constant for units conversion, A is the surface area in cm , W is the mass loss in grams, t is the time of exposure in seconds, and is the density of the...
-
Page 10: Applications For The Ms1000
C. Applications for the MS1000 • Measure the instantaneous corrosion rate in aqueous solutions. For example, the content and dosage of inhibitors in water treatment facilities and chemical process plants can be monitored and optimized. • Monitor the actual lifetime of plant equipment. Corrosion monitoring provides data that may be combined with other forms of data to estimate the lifetime of equipment in the plant. -
Page 11: Ms1000 Specifications And Features
C. MS1000 Specifications and Features Model MS1000 - LPR Corrosion Meter (Ordering # IN1000) Physical Data Instrument Weight: 0.84 lb. (0.38 Kg) Total Weight w/ Carrying Case and Accessories: 5.20 lb. (2.36 Kg) Instrument Dimensions: 7.63"H x 4.15"W x 1.3"D (19.38cm x 10.54cm x 3.30cm) - Page 12 Special Features • Microprocessor-based electronics • Function key interface using 4-key keypad and 4-line LCD display • Low-battery detection • Portable Accessory Items Carrying Case, 10' Probe Cable, Battery Charger, Lightweight Protective Case, Meter Prover, Operation Manual...
-
Page 13: Ms1000 Operation
III. MS1000 Operation A. Test Readings The MS1000 is supplied with a test probe to check proper functioning of the cable and instrument. In order to guarantee the accuracy of your data, check the instrument readings at room temperature with the test probe prior to taking measurements. -
Page 14: Zra And Epr Measurements
C. Electrode Installation, Replacement, and Care The electrodes supplied from Metal Samples have a 600 grit (ground) surface finish. The electrodes are also degreased and shipped in volatile corrosion inhibitor (vci) bags for protection. Additional cleaning of the elements prior to use is not required. -
Page 15: Correcting For Low Solution Conductivity Effects
New electrodes are 1.250" (31.75 mm) in length and 0.188" (4.76 mm) in diameter. As corrosion occurs, the electrode diameter decreases. As a result, the electrode surface area decreases and the distance between the electrodes increases. These two factors are sources of error and may diminish the accuracy of the measured corrosion rate. - Page 16 the two electrodes in cm, and is the solution conductivity in ohms cm. Specific guidelines for this correction technique are detailed in ASTM G102. The above equation has been used to analytically derive a correction curve for low solution conductivity effects. The curve is plotted as a function of the corrosion rate, as measured by the instrument, and the solution conductivity.
- Page 17 An example of how to use the correction curve is given below. If the Corrosion Rate (Instrument Reading) = 1.00 mpy and the Solution Conductivity = 100 µmhos/cm then the value on the x-axis of the graph may be calculated as Corrosion Rate (mpy) Solution Conductivity (µmhos/cm) Referring to figure 3, a value of 10...
-
Page 18: Uns Constant Table
IV. UNS Constant Table The following lists many of the common constructional metals/ alloys with their appropriate alloy constants. Alloy Alternate Major Constituents UNS# Const. Designation (or common names) F12101 Gray Cast Iron F13502 Gray Cast Iron G10100 AISI 1010 0.1% Carbon Steel G10180 AISI 1018... - Page 19 Alloy Alternate Major Constituents UNS# Const. Designation (or common names) C23000 ASME B16.22 85-15 Brass C63000 AMS 4640 Aluminum Bronze C68700 ASME SB111 Aluminum Brass (Arsenical) C44300 ASME B111 Admiralty Brass C70690 ASTM F96 90-10 Copper Nickel C71590 ASTM F96 70-30 Copper Nickel N04400 AMS 4544...
-
Page 20: Maintenance
V. Maintenance The only maintenance item in the MS1000 is the 9 volt rechargeable battery. A battery charger is included with the instrument to facilitate recharging. The battery will recharge to full capacity in a few hours. The LED indicator on the battery charger will turn red while the battery is charging, and will turn green when the battery is fully charged. - Page 21 connect pins A and D on the calibration probe directly to the lower two pins of the probe connector on the instrument. You may plug the instrument into a power outlet, turn the instrument on, and then the measured corrosion rate should be 5.00 ± 0.05 mpy. If the instrument does not calibrate properly, please contact Metal Samples.
-
Page 22: Replacement Parts
VII. Replacement Parts Replacement parts for the MS1000 as well as replacement electrodes and probes are available from Metal Samples. Replacement items and part numbers are listed below: Item Description Part Number MS1000 IN1000 Probe Cable IN1000-2 Rechargeable battery (NiCad)*... -
Page 24: Warranty
VIII. Warranty Metal Samples will correct, either by repair or replacement, any defect of material or workmanship which develops within ninety (90) days after startup, or six (6) months from the date of shipment to the original purchaser, whichever comes first, provided that an inspection by Metal Samples discloses that such a defect developed under normal and proper use. -
Page 25: References
IX. References “G-59: Standard Practice for Conducting Potentio-dynamic Polariza- tion Resistance Measurements”, 1993 Annual Book of ASTM Stan- dards, Vol. 3.02, Wear and Erosion: Metal Corrosion, ASTM, p. 219, (1993). F. Mansfeld, Electrochemical Techniques for Corrosion Engineers, NACE, Houston, TX, p. 67-73 (1986). F.
Need help?
Do you have a question about the MS1000 and is the answer not in the manual?
Questions and answers