The compact Corrosion Testing Instrument, Model 606-Basic, to perform salt spray and condensation tests, is made of impact resistant, eco-friendly polypropylene material and is delivered in a rectangular design. It consists of a test chamber, available either of 400 l, 1000 l or 2000 l capacity, and a built-in control unit as well as an external storage tank for the spray. The control unit is equipped with the necessary control instruments. The test chamber can be opened manually. A dosing pump serves for an infinitely variable adjustment to achieve optimum consumption of spray solution. The external storage tank for approx. 200 l salt solution allows continuous testing without attention over a period of up to a week. The scope of supply of each test chamber includes three specimen holders for weathering panels.
For testing small quantities or small test specimens, the user has access to a corrosion testing apparatus in a modular design (cabinet unit) with 300 l test chamber volume. The large, transparent access door allows easy mounting of specimens, which may e.g. be hung from the delivered sample rods, to be exposed to aggressive salt spray for a certain period of time. The integrated control unit with storage tank (about 125 l) is located in the base unit.
Purpose and application
Ferrous and non-ferrous metals are attacked continuously by humidity, acids, solutions, gases etc. It is therefore vitally important to choose the correct surface protection. There are many materials and qualities on the market and their properties must be properly assessed. Materials intended to prevent corrosion must be tested if failures are to be avoided. Furthermore the comparative quality control during production is of increasing importance. The best known processes employ spray vapour tests using various salt solutions as well as condensation water climates.
Test principle
Aggressive solutions are turned into a vapour mist in accordance with the tests that are listed below. These vapours surround the specimens in the test chamber either continuously or in a cyclic manner. The corrosion resistance of the individual specimens is established on the basis of the difference in time before the first corrosive effects become apparent.