ISO 4524-2:2000 PDF

Scope: This part of ISO 4524 provides procedures for conducting mixed flowing gas (MFG) environmental tests involving exposures to controlled quantities of corrosive gas mixtures. It describes the required equipment and the methods for gas, temperature and humidity control that enable tests to be conducted in a reproducible manner. Reproducibility is measured through the use of control coupons the corrosion films of which are evaluated by mass gain, coulometry or by various electron and X-ray beam analysis techniques. Reproducibility can also be measured by in situ corrosion rate monitors using electrical resistance or mass frequency change methods. MFG tests can be used to: — evaluate novel electrical contact metallization for susceptibility to degradation due to environmental exposure to the test corrosive gases; — evaluate the shielding capability of connector housings that may act as a barrier to the ingress of corrosive gases; — evaluate the susceptibility of other connector materials such as plastic housings to degradation from the test corrosive gases. MFG tests are not normally: — used as porosity tests (for guidance on porosity testing, see ISO 10308, Metallic coatings — review of porosity tests); — applicable where the failure mechanism is other than pollutant gas corrosion such as in tin-coated separable contacts.

ISO 4524-2:2000 Referenced Document

IEC 60050 International Electrotechnical Vocabulary (IEV) - Index
ISO 10313:1993 Ambient air; determination of the mass concentration of ozone; chemiluminescence method
ISO 12687:1996 Metallic coatings - Porosity tests - Humid sulfur (flowers of sulfur) test
ISO 3696:1987 Water for analytical laboratory use; Specification and test methods
ISO 4221:1980 Air quality; Determination of mass concentration of sulphur dioxide in ambient air; Thorin spectrophotometric method
ISO 4677-1:1985 Atmospheres for conditioning and testing; Determination of relative humidity; Part 1 : Aspirated psychrometer method
ISO 4677-2:1985 Atmospheres for conditioning and testing; Determination of relative humidity; Part 2 : Whirling psychrometer method
ISO 6349:1979 Gas analysis — Preparation of calibration gas mixtures — Permeation method
ISO 6767:1990 Ambient air; determination of the mass concentration of sulfur dioxide; tetrachloromercurate (TCM)/pararosaniline method
ISO 7934:1989 Stationary source emissions; determination of the mass concentration of sulfur dioxide; hydrogen peroxide/barium perchlorate/thorin method
ISO 7996:1985 Ambient air; Determination of the mass concentration of nitrogen oxides; Chemiluminescence method
ISO 9096:1992 Stationary source emissions; determination of concentration and mass flow rate of particulate material in gas-carrying ducts; manual gravimetric method

2000 ISO 4524-2:2000 Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part 2: Mixed flowing gas (MFG) environmental tests
1985 ISO 4524-2:1985 Metallic coatings; Test methods for electrodeposited gold and gold alloy coatings; Part 2 : Environmental tests