Category: ‘Corrosion’
Copper have good resistance to corrosion in urban, marine, and industrial atmospheres. The major factors that control the initial rate of attack on copper are moisture, temperature, and the level of pollution. Soon after exposure... Read More...
Galvanic corrosion occurs when two dissimilar metals having different electrical potentials are electrically connected.
Aluminum and Aluminum alloys become the anode in galvanic cells with most metals. The rate of galvanic corro... Read More...
The methods for avoidance of galvanic corrosion are in general suggested by the above descriptions of the conditions necessary for its occurrence.
Don’t Mix Metals. If only one material is used in a construction the problem is... Read More...
Stainless steel naturally form passive surface films this is what makes them “stainless”. This film also reduces the amount of current available for corrosion, so slows the corrosion rate down compared to some other galvanic ... Read More...
The relative area of the anode and cathode has a pronounced effect upon the amount of corrosion that occurs due to Galvanic Corrosion. A small anode (the less noble metal, such as aluminium) joined to a large cathode (the more n... Read More...
For galvanic corrosion to occur there are three conditions which must be met:
Condition 1. Metals must be far apart on the galvanic series
The galvanic or electrochemical series ranks metals according to their potential, gen... Read More...
Corrosion damage in three types of concrete (C25, C45, and C55), resulting from Hydrochloric Acid HCL with various contents, was investigated by comparing the mechanical properties of different types of concrete and their ... Read More...
Potentiodynamic polarisation and ac impedance studies were carried out on the inhibition of carbon steel in 0.1 M Hydrochloric acid HCl solution by various Schiff bases containing heteroaromatic substituents. The examined Sch... Read More...
Sulfuric acid H2SO4 is not necessarily more corrosive to steel than hydrochloric acid HCl. The corrosion rate is dependent on many factors including concentration of the acid, temperature, type of steel, contaminants, and velocit... Read More...
The corrosion behavior of nickel, Inconel 600 and Inconel 690 was studied in different concentrations of HCl Hydrochloric Acids solution and its inhibition by natural rosemary oil using galvanostatic polarization techniques. It w... Read More...
To help you make the best material decisions for your application zx52 has provided a variety of corrosion data by material and media. This collection of information includes experimental data and data from reference books. ... Read More...
The magazine "Nature" published two articles in the February 14th 2002 which reported research work done at Imperial College of Science, Technology and Medicine, by Mary P. Ryan and co-workers. This publication sets out to clarif... Read More...
The corrosion resistance of stainless steel arises from a passive, chromium-rich, oxide film that forms naturally on the surface of the steel. Although extremely thin at 1-5 nanometres (i.e. 1-5 x 10-9 metres) thick, this protect... Read More...
The corrosion tables show the anticipated resistance of a range of stainless steel grades to a wide range of chemicals (including most common acids). This can be used in the same way as the corrosion handbook. The link opens the ... Read More...
With appropriate grade selection of stainless steel, will give good corrosion resistance. However, the choice of an inappropriate grade can result in failure by perforation or catastrophic cracking in shorter times than failure b... Read More...
Halogenated gases are employed in semiconductor manufacturing for a wide number of processes, including plasma etching of polysilicon, diffusion furnace cleaning and oxidation processes. The selection of components for use in a... Read More...