Abstract: Disclosed is an oil sensor having roughened electrode surfaces to produce oil condition related output current or voltage from the automotive engine oil as it is used.

Abstract: An automotive air conditioning system evaporator core is formed of an aluminum alloy and has a biocidal coating comprising a zinc layer deposited onto said aluminum alloy and an outermost elemental copper plate overlying said zinc layer. During air cooling operations, slightly acidic condensate accumulating on the surface reacts with the copper to form cupric ions that inhibit microbial growth.

Abstract: A hard iron alloy plate is electrodeposited from a high-conductivity aqueous plating solution containing ferrous ions and cobalt ions. The product plate is composed of up to 6 percent cobalt and the balance iron and is characterized by microscopic cracks perpendicular to the plate surface and effective to reduce the residual tensile stress to below about 60 MPa.

Abstract: A process for exchanging a surface layer of a moving steel strip with an iron layer of different composition (e.g., pure iron). The strip is anodically polarized in an iron-ion-containing electrolyte to erode the surface of the electrode-strip, supply iron ions to the electrolyte and electrodeposit iron onto a counterelectrode-strip moving in the opposite direction through the electrolyte. Thereafter the polarities of the electrode and counterelectrode strips are reversed so as to electrolytically erode a surface of the counterelectrode while plating substantially pure iron on the previously eroded portion of the electrode-strip.