TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Device: The alternative power source is a fuel cell having an electrode assembly comprising an anode, a cathode, and an electrolyte.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Properties: The corrosion-inhibiting heat-transfer fluid has a conductivity of less than 10 muS/cm. The colloidal silica has an average particle size of 1-200 nm.Preferred Composition: The corrosion-inhibiting heat-transfer fluid comprises azole (1-5000 ppm), siloxane-based surfactant (0.01-10 wt.%), and colloidal silica (not greater than 10000 ppm). It may contain alcohol and water.Preferred Components: The azole compound is of formulae (I)-(IV). The siloxane-based surfactant is a compound of formula RSi(OR)3 (S1).R=halo such as Cl or Br, 1-20C alkyl, or preferably H or 1-less than 10C alkyl (in I-IV); and aromatic, cycloaliphatic, alkyl, alkoxy, or alkylene and containing heteroatoms such as N or S (in S1);R'=H, 1-20C alkyl, and/or SH or SR;X=C-SH, CH, or preferably N; andY=N, C-R or CH.The alcohol is methanol, ethanol, propanol, butanol, furfurol, ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, dipropylene glycol, butylene glycol, glycerol, monoethylether of glycerol, dimethyl ether of glycerol, 1,2,6-hexanetriol, trimethylolpropane, and/or methoxyethanol.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The siloxane-based surfactant may be polysiloxane and/or organosilane compound comprising silicon-carbon bond(s). It may be a compound of formula R3-Si-(O-Si(R)2)x-OSiR3 (S2).R=alkyl or 1-200C (preferably 2-6C) polyalkylene oxide copolymer; andx=0-100. SPECIFIC COMPOUNDS - The azole compound is benzotriazole, tolytriazole, 4-methyl benzotriazole, 5-methyl benzotriazole, butyl benzotriazole, mercaptobenzothiazole, benzimidazole, methyl benzimidazole, and/or chloro- or bromo-methylbenzotriazole. The siloxane-based surfactant is 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N-2-(aminoethyl)-3-aminopropyltrimethoxysilane, octyltriethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, methyltriethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, isobutyltrimethoxysilane, phenyltrimethoxysilane, and/or methyltrimethoxysilane.    EXAMPLE - A heat-transfer fluid containing glycol (50 wt.%), chloroethylene (50 ppm), and Nyacol 215 (RTM: a colloidal silica with a nominal particle size of 4 nm) was prepared. The fluid was tested for its corrosion protection effectiveness. Results showed incorporation of Nyacol 215 (RTM) effectively inhibits pitting corrosion of aluminum and its alloy.