A5032195070- Concrete Corrosion and Durability
- Corrosion Behavior and Inhibition
- Concrete and Cement Materials Research
- Magnesium Oxide Properties and Applications
- Materials Engineering and Processing
- Combustion and Detonation Processes
- Hydrogen embrittlement and corrosion behaviors in metals
- Fire dynamics and safety research
- Gas Sensing Nanomaterials and Sensors
- Atmospheric chemistry and aerosols
- Polymer Science and PVC
Cenim - Centro Nacional de Investigaciones Metalurgicas
2017
Metallurgical Research Institute
2008
Spanish National Centre for Cardiovascular Research
2008
<title/>Copper is widely used in many applications such as heat exchangers, condensers, heating and air conditioning systems, electricity, electronic circuitry ornamental parts. This paper reviews the issue of copper corrosion different environments applications. Special attention paid to influence relative humidity low molecular weight carboxylic acids. These acids are present rain, snow, clouds particulate matter contribute about 15-35% rain acidity. Attention also originated by formic,...
"Ant-nest" corrosion is a specific type of premature failure copper tubes used in air-conditioning units causing the loss refrigerant liquid and consequent environmental pollution. It known that attack requires simultaneous presence moisture, oxygen, corrodent, usually formic acid. This occurs thin-walled pipes, especially when deoxidized high residual phosphorus. A study has been made products formed by action acid vapor for exposure at 100% relative humidity under thermal cycling. The...
The penetration of three phosphate compounds in mortar bulk matrix, sodium monofluorophosphate (Na2FPO3) (MFP), disodium hydrogen (Na2HPO4) (DHP) and trisodium (Na3PO4) (TSP) has been evaluated using two water:cement ratios (0.5 0.6). samples were immersed a 5% MFP, DHP or TSP solution for period 40 days. Microprobe line profile analysis phosphorus (P) fluorine (F) showed similar behaviour the soluble phosphates, which penetrated to depth more than 2 mm, below P F contents dropped almost...
Abstract not Available.
The copper corrosion products originated by the action of formic, acetic and propionic acid vapors at a 100% relative humidity were studied for period 21 days. Five vapor concentrations (10, 50, 100, 200 300 ppm) tested. corrosion-product layers characterized using electrochemical methods. Some compounds identified were: cuprite (Cu2O), three acids; cupric hydroxide monohydrate (Cu(OH)2•H2O) formate tetrahydrate (Cu(HCOO)2•4H2O), formic acid; acetate dihydrate (Cu(CH3COO)2•2H2O)...