Engineering & Mining Journal

OCT 2018

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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Page 44 of 91

CORROSION OCTOBER 2018 • E&MJ 43 8020CI will stop the further corrosion of reinforcing metals and extend the service life of the structure. The principal benefits of MasterProtect 80201CI, according to BASF, include: • Reduces corrosion rate of corroding steel not yet visible; • Provides protection in new structures where insufficient cover is an issue; • Stops the formation of incipient anodes at new to old concrete interface; • Does not interfere with bond of repair mortars or coatings — can be used di- rectly on areas to be repaired; • Forms passive layer underneath rust on steel — slows corrosion to allow for long- er term repair strategy to be put in place; • Easy application; • Water-based; • Allows concrete to breathe and vapor to diffuse — is not a vapor barrier; • Dual action inhibitor — protects both anodic and cathodic areas; and • No cure time required. Protecting Control Equipment To be sure, not all corrosion-preventative solutions focus on the steel and concrete substrates that constitute much of the mining industry's asset base. The degra- dation of electrical control equipment by corrosive gases and substances is a well- known process and, as air filtration spe- cialist Camfil pointed out, heavy industries such as mining are becoming increasingly reliant on electronic and electrical controls for the safe and efficient operation of var- ious — often automated — processes. In many industrial environments, the exter- nal air around a facility may contain acidic gases. Plus, fine particles in the atmo- sphere, containing corrosive contaminants in the form of salts of ammonium and sulfate that retain moisture, may come to rest on control equipment. Either of these conditions can lead to corrosion problems. Camfil said molecular filtration using adsorption technology is the industry-ac- cepted method to remove corrosive agents from the air. The company's corrosion control solution includes evaluation of a site's environmental conditions; provid- ing filtration solutions in accordance with corrosive-gas concentration levels and the operating conditions of the existing venti- lation systems; and on-site performance monitoring, in accordance with applica- ble standards such as ANSI/ISA -71.04- 2013 and IEC 60721-3-3. Filter supplier AAF Flanders also fo- cuses on the problem, noting that strict- er environmental guidelines have forced many manufacturers to replace lead- based solders with lead-free solutions, which are more susceptible to corrosion of circuit boards and components from airborne gaseous and particulate con- taminants. These forms of corrosion can cause failure by either impeding the flow of electricity or forming unintended cir- cuit paths. In response to these problems, the in- dustry has developed a standard to classify control rooms and process control envi- ronments. Most equipment manufacturers require that a control room environment meets the ISA G1—Mild classification to maintain a reliable communication network in industrial environments. The only way to meet this requirement in many industrial environments, according to AAF Flanders, is with adequate gas-phase and particulate filtration in control-room spaces. Switch to CARBO ceramic grinding media for better all-around value and performance CARBOGRIND high-performance ceramic grinding media is engineered to provide superior strength and wear resistance with a consistent particle size and spherical shape. • Improves grinding efficiency • Longer product life cycle • Reduces overall costs • Lowers equipment maintenance costs • Meets or exceeds OEM ceramic grinding media specs Contact us today to learn how you can improve your grinding efficiency while lowering overall costs. +‚ ƒ„„ ……‚ †‡ˆ‰••-grinding

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