Corrosion resistance definition

Corrosion Resistance. The environment to which a plated part is to be exposed should be a part of any definition of corrosion resistance. Problems arise in testing a part in its intended environment in part because of the long time period required. In many plating processes, corrosion resistance is direcdy proportional to the plate thickness, so a specification on plate thickness is a much faster method of indirectiy measuring corrosion resistance. In specifying a corrosion resistance requirement for the production of plated goods, accelerated tests are used especially if plate thicknesses caimot be related to corrosion protection. 

The case is different again under micro-discontinuous (i.e. micro-cracked or micro-porous) chromium, on which a definite improvement in corrosion resistance can be achieved when copper is present under the nickel coating . 

Corrosion-resistant floors and linings can be installed using either "tilesetter s" or "bricklayer s" methods. By definition, a "tile" is anything up to 1-3/16" thick, and a "brick" is anything thicker than 1-3/16". Each of these procedures will be described in detail. 

In several cases, materials for combined erosive and corrosive conditions have been evaluated on the basis of separate erosion and corrosion studies and data, with the consequence that the synergistic effects are left out of the evaluation. Since one or the other of these effects may be large, the conclusions may be quite wrong. For materials fliat usually are passive due to a dense oxide film, such as stainless steels, Wc is by definition very low. But since sand erosion more or less destroys the passive film, the corrosion rate increases strongly and may reach very high values, i.e. the contribution of Wce may be particularly high for these materials. The other synergy effect, Wec, is most pronounced for ceramic-metallic materials in which the metallic phase has inferior corrosion resistance, e.g. for a cemented carbide with a metallic phase of cobalt (WC-Co). 

Depending upon the degree of curing, natural rubber is classified as soft, semihard, or hard rubber. Only soft rubber meets the ASTM definition of an elastomer, and therefore, the information that follows pertain only to soft rubber. The properties of semihard and hard rubber differ somewhat, particularly in the area of corrosion resistance. 

Definition Group of corrosion resistant steels containing at least 10% chromium and may contain other alloying elements maintains strength at high temps. 

Stainless steel contains at least 10.5 % chromium and a maximum of 1.2 % carbon and is therefore per definition high alloyed. Based on their microstructure, stainless steels can be subdivided into ferritic, martensitic, ferritic-austenitic, and austenitic steels. According to their usage properties, stainless steels can be categorized into corrosion-resistant steels, heat-resistant steels, and high-temperature steels (Klocke 2010). 

See Cocamide DEA Stafoam DFC. See Cocamide MEA Stafoam DL. See Lauramide DEA Stafoam DO, DOS. See Oleamide DEA Stafoam F. See Cocamide DEA Stafoam L. See Lauramide DEA Stafoam MF. See Cocamide MEA Staform P. See Gum ghatti A-stage resin. See Phenolic resin Stainless steel CAS 12597-68-1 Synonyms Steel, stainless Definition Group of corrosion resistant steels containing at least 10% chromium and may contain other alloying elements maintains... 

Filiform corrosion resistance The ability of a coating to resist that type of corrosion of metal substrates characterized by a definite... 

Durability studies on bonded aluminum joints have established that a definite relationship exists between bond permanence and the corrosion resistance of the aluminum alloy. The differences in performance are most apparent when the test specimens have been exposed to a corrosive environment. 

These techniques for evaluating crevice corrosion resistance involve holding (static) or incrementally changing (step or scan) the potential or current. Some of the more frequently used techniques for evaluating crevice corrosion resistance are listed below, following the definitions given in ASTM G 15 ... 

---