摘要:
The galvanic cathodic protection of steel embedded in concrete structures is enhanced by the utilization of a flexible composite anode assembly containing a sacrificial anode member. The anode member is at least partially covered by a matrix comprising an ionically-conductive material. The conductive material includes at least one electrochemical activating agent such as a mixture of lithium bromide and lithium nitrate and a compressible water-retaining mineral such as a phyllosilicate mineral. The presence of this mineral in the matrix increases the current delivered by the anode, thereby resulting in a greater level of cathodic protection, and a longer effective service life of the anode. Exfoliated vermiculite is a preferred phyllosilicate mineral and is present in an amount of between about 2% and about 15% by weight, based on the total weight of the matrix.
摘要:
An anode for cathodically-protected steel-reinforced concrete is embedded in an ion-conductive overlay on the concrete structure. The anode comprises at least one sheet of highly expanded valve metal mesh having a pattern of voids defined by a network of valve metal strands connected at a multiplicity of nodes. This provides a redundancy of current-carrying paths through the mesh which ensures effective current distribution throughout the mesh even in the event of possible breakage of a number of individual strands. The surface of the valve metal mesh carries an electrochemically active coating. At least one current distribution member is welded to the valve metal mesh. The entire area of the structure to be protected, excluding non-protected openings for obstacles and the like, is covered by a single piece of the mesh, or several pieces in close proximity with one another.
摘要:
This invention relates generally to an electrically conductive valve metal mesh of extreme void fraction. More particularly the invention relates in a most important aspect to an application thereof for an electrode structure in such a way as to prevent the corrosion of steel, including reinforcing steel in concrete, by cathodic protection.
摘要:
A seating device for aged, infirm and handicapped persons includes a passive, pivotably mounted, energy storage device laterally disposed below a seat base, and a parallelogram linkage between the seat base and a chair seat for controlling elevation and tilting motion of the seat. A lever which can be coupled at selectable points along an arc about the pivot point of the energy storage device exerts torque on the parallelogram linkage to oppose downward movement and aid upward movement. By varying the position of engagement of the energy storage device to the lever, the force exerted can be adjusted to the weight of the user.
摘要:
Biofouling and scale control in conductive aqueous systems is effected on metal, preferably valve metal such as titanium, surfaces on which such fouling normally occurs by applying thereto a stable electrocatalytic coating, anodically polarizing said valve metal coating such that essentially only oxygen is evolved at the surface thereof, preferably at a rate of at least about 4.66 millimoles per square meter per hour without evolution of any chlorine. Periodic current reversal is effected to forestall biofouling upon any cathode utilized in implementing the instant invention.
摘要:
Electrolysis of impure saline solutions containing dissolved manganese causes deposits to form on the anodes of such electrolysis cell which rapidly reduces the efficiency of the cell. The efficiency of the cell is rejuvenated periodically by changing the polarity of the anode for from one to ten minutes at an amperage of from about 2 to 50 milliamps per square inch.
摘要:
The galvanic cathodic protection of steel embedded in concrete structures is enhanced by the utilization of a flexible composite anode assembly containing a sacrificial anode member. The anode member is at least partially covered by a matrix comprising an ionically-conductive material. The conductive material includes at least one electrochemical activating agent such as a mixture of lithium bromide and lithium nitrate and a compressible water-retaining mineral such as a phyllosilicate mineral. The presence of this mineral in the matrix increases the current delivered by the anode, thereby resulting in a greater level of cathodic protection, and a longer effective service life of the anode. Exfoliated vermiculite is a preferred phyllosilicate mineral and is present in an amount of between about 2% and about 15% by weight, based on the total weight of the matrix.
摘要:
This invention relates generally to an electrically conductive valve metal mesh of extreme void fraction. More particularly the invention relates in a most important aspect to an application thereof for an electrode structure in such a way as to prevent the corrosion of steel, including reinforcing steel in concrete, by cathodic protection.
摘要:
A novel and unique golf club, particularly a putter, is disclosed which has an effective structure for attaching the shaft of the club to the club head, such that the result is a self-compensating putter and consistently accurate putts. In a preferred embodiment, a golf club is provided which comprises a shaft and a club head having a front face. The club head has a length along which the front face extends. Advantageously, the shaft is attached to the club head at two discrete mounting locations along the length of the club head, which results in a consistently stable and comfortable swing.
摘要:
An alkali metal rechargeable battery utilizing an electrochemical reaction between an alkali or alkaline earth metal and sulfur. The metal is included in an amalgam anode.