S.a. Texaco Belgium N.v.

Texaco Inc.

S.a. Texaco Petroleum Nv

Texaco Inc. & S.a. Texaco Petro, N.v.

Jean P Maes

Jerome W Darden

Carol A Triebel

Walter A Van Neste

Alan Molyneux

Rita Vereecken

A corrosion inhibitor for use in aqueous and liquid alcohol compositions is described comprising the combination of:

Corrosion-inhibited antifreeze/coolant composition

A corrosion-inhibited antifreeze concentrate formulation containing no phosphate, amine, or nitrite compounds consists essentially of:

Corrosion-inhibited antifreeze formulation

A corrosion inhibitor for use in water and liquid alcohol antifreeze/coolant compositions comprising the combination of a C.sub.5 -C.sub.16 aliphatic monobasic acid or the alkali metal, ammonium, or amine salt of said acid, a C.sub.5 -C.sub.16 hydrocarbyl dibasic acid or the alkali metal, ammonium, or amine salt of said acid, and a hydrocarbyl triazole gives synergistic corrosion protection to metal surfaces as compared with formulations containing either the monoacid or diacid component alone, or formulations containing other conventional corrosion inhibitors.

Monobasic-dibasic acid/salt antifreeze corrosion inhibitor

Method and apparatus for continuous measurement and control of the stability of colloidal systems such as heavy fuel oils, using an optical procedure with near-infrared radiation. A stream of liquid representing the colloidal system is passed through a loop or elongated conduit. In the latter, measured amounts of a flocculating agent is progressively added to the stream at a series of spaced apart stations in the loop which define separate segments. These additions progressively enhance the amount of flocculating agent to the colloidal liquid to a point where flocculation occurs. The character of each segment of the loop is tested by irradiation whereby the mixture in each segment is measured to determine in which segment flocculation has commenced. A suitable signal, whether audible or visual, can then be provided to indicate the occurrence.

Optical method to study the stability of colloidal systems

Corrosion protection is provided to a metallic structure by a sacrificial anode system. A current control element is used to achieve fast and adequate corrosion protection under changing conditions, while excess current flow is minimized to extend anode life and avoid overprotection. The basic advantages of sacrificial anode systems such as simplicity and autonomy are retained. The system employs a field effect or a MOS (metal oxide silicon) semiconductor device to act as the current control element.

Sacrificial cathodic protection system

A combined temperature control is an integral part of a corrosion probe. The probe includes a corrosion measuring element as one part thereof. The integral temperature control portion acts to provide a desired temperature at the measuring element. And, the result permits creation of the worst corrosive conditions at the measuring element of the probe, irrespective of the location of the probe in the corrosive environment.

Corrosion probe combination

A method and apparatus for evaluating the corrosion protection that will be provided to a metallic surface by a surface layer. The layer is formed by use of corrosion inhibitors in a corrosive fluid.

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Merelbeke, Belgium

Jean P Maes