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CORROSION LABORATORY |
| Brief description of laboratory activities. |
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Corrosion is an ubiquitous phenomenon that affects the infrastructure, industrial equipments, automotive, electronics and any structure, machine or device that contains metallic components.
Corrosion Laboratory, established in December 2008, is equipped for electrochemical testing and accelerated corrosion tests, conducting of applied research to find practical solutions for solving the problems caused by corrosion and the development of new technologies for detection, prevention, characterization and corrosion control.
| Analysis and characterization techniques used in the laboratory. |
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| Electrochemical tests |
| VoltaLab 80 (PGZ402 & VoltaMaster 4) |
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Manufacturer: Radiometer Analytical – Copenhagen
Manufacture year: 2007
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Technical characteristics:
- Maximum compliance voltage: ± 30 V;
- Maximum current output: ± 1 A;
- Maximum polarisation voltage: ± 15 V;
- Measured potential ranges: ± 2V, ± 4V, ± 8V, ± 15V; best resolution: 60 µV;
- Measured current:
- highest range: 1 A (9 ranges)
- lowest range: 10 nA (with gain)
- resolution (% of range): 0.003%
- Maximum scan rate: 20 V/s;
Accessories:
The device is equipped with a rotating disc electrode stand, quick-fit exchangeable tips for rotating disc electrode (zinc, glassy carbon, platinum, copper, graphite, nickel, iron, stainless steel), platinum auxiliary electrode and Ag / AgCl, KCl sat. reference electrode. |
Applications:
VOLTALAB 80 (PGZ402 Universal Potentiostat) is a complex apparatus with VoltaMaster 4 Software, version 7.0.8, which allows multiple analysis: chrono potentiometry, chrono amperometry, voltammetry i = f (E) and E = f (i), Evans diagrams, corrosion tests, stationary voltammetry, impedance studies, etc. and achievement of analysis techniques for electrodes electroactivity.
It can also determine the rate of corrosion by electrochemical way, this method is based on the direct correlation between the current measured at the electrodes and the amount of metal transferred in corrosive environment. It can perform studies to determine optimum conditions for electrochemical surface coatings (deposition of metals, conversion coatings).
Brief description of the technique:
Corrosion tests generally include polarization curves, Tafel and Stern analysis, Pitting tests, Polarisation resistance tests and Evans tests.
Contact:
Persoana responsabila de aparat:
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| Accelerated corrosion tests |
| Salt fog chamber (DCTC 600) |
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Manufacturer: AngelAntoni Italia
Manufacture year: 2008 |
Technical characteristics, accessories:
- capacity: 506 L ;
- temperature range (ºC): ambient ÷ 55 ºC;
- humidity range: 50 ÷ 98 %;
- corrosion testing chamber is equipped with temperature and humidity controller;
- PLC controller with digital display for setting of time and operation cycles;
- very precise dosing and high accuracy (atomisation) spraying of saline solution;
- flowmeter for salt soltion flow reading
- manometer and regulating valve for the control of compressed air flow used for spraying (2-6 bar)
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Applications:
Salt fog chamber allows studying samples at a strong filiform and scab corrosion. It is used to study / testing corrosion resistance of different metal parts, galvanic coatings with ornamental purposes and / or protective role, determining the quality and uniformity of protective coatings, etc.
Possible tests:
- Dry corrosion test (UNICHIM)
- Continuous salt spray (ASTM)
- Alternate salt spray (Adjustable timer) (DIN)
- PROHESION Test
Characteristics of the analyzed samples:
Ornamental and / or protective coated metal pieces or uncovered metal pieces
Brief description of the technique
Saline solution is sprayed into the test chamber through a polycarbonate adjustable nozzle. The device has adjustments for maintaining of the saline solution concentration (sodium chloride solution and / or ammonium sulfate) sprayed as an aerosol in a fixed volume, maintaining of the temperature between the set values and maintaining of air humidity, according to the European Union standards (UNICHIM Standard method 741 and UNICHIM Standard method 692).
Contact:
Person responsible for the device:
Eng. Marius Dobrescu
Tel: 0256-222119 |
- Electrochemical tests
- Study / testing of resistance at accelerated corrosion in saline fog for different metallic materials and surface coatings;
Head of Laboratoryr:
Delegate Head of Laboratory: