Abstract: A device for treating and conditioning engine coolant for use with an internal combustion engine includes a housing having an inlet and outlet and a filtering media and container carrying coolant treatment material located within the housing. Coolant passes through the filter, and then is exposed to the tip of a rod which erodes away to permit treatment material to be discharged in the coolant. As the corrosiveness of the coolant decreases, erosion of the rod is discontinued, so that additional treatment material is no longer discharged into the coolant. Accordingly, the corrosiveness of the coolant is controlled to within relatively narrow limits.

Abstract: The invention relates to a sensor system for in-situ monitoring of lubricant oil quality. The sensor system consists of a sensing element located in-situ in contact with lubricant oil. The sensor is corrodable and upon deterioration of the oil the sensor corrodes and eventually the circuit will break. Current flow through the circuit is monitored by conventional power supply and measuring devices and upon breaking of the sensor, an indication is provided to the driver of a motor vehicle indicating that oil is to be changed.

Abstract: The invention relates to an improved sensor for use in-situ in an electrical circuit which sensor corrodes as a result of deterioration of the oil and provides a changing electrical current due to increased resistance resulting from said corrosion. The sensor preferably is a ceramic tube havign a first layer of electrolessly deposited nickel thereon with a second layer of electrolitically plated lead. Leads are attached to the ends of the tube and the sensor can then be employed in-situ in oil to, as a result of its corroding and change in resistivity, measure deteriorating oil quality.

Abstract: Nickel electrodes having selenium and/or tellurium electrochemically deposited thereon are disclosed. The nickel electrodes of this invention may be employed in primary or secondary alkaline batteries, and said electrodes exhibit improved currents and charges (i.e. with respect to pure nickel electrodes) when said electrodes are employed in primary or secondary batteries.

Abstract: A high surface area alumina is prepared by heating a solution of an aluminum trialkoxide in a secondary or tertiary alcohol solvent to a sub-critical temperature at which the solvent decomposes to form water, and the water so formed hydrolyzes the aluminum trialkoxide. Solutions include aluminum tri-s-butoxide in s-butanol. The resultant aluminas have surface areas 500 m.sup.2 /g or greater.