A corrosion protection element is described, with which in simple and cost effective manner a reliable corrosion protection of field devices can be provided, which field devices comprise at least one component of stainless steel in contact with an environment of the field device. Corrosion protection elements of the invention are distinguished by features including that they are embodied as sacrificial anodes comprising iron or rustable steel and have a form, which is embodied in such a manner that they can be applied to the component of the field device in such a manner that the sacrificial anode is in electrically conducting contact with the component.

An array of anode assemblies for insertion at a plurality of locations in a gap between a section of a reinforced concrete structure and another solid structure is provided. Each anode assembly comprises an expandable member, an anode attached to the expandable member for protecting a steel reinforcement in the reinforced concrete structure, and an anode connector for interconnecting the array of anode assemblies. During use, each anode assembly of the array of anode assemblies is inserted into the gap, between the section of the reinforced concrete structure and the solid structure, at the plurality of locations. The expandable member of each anode assembly is configured to expand so as to press the anode into contact with a surface of the reinforced concrete structure.

An array of anode assemblies for insertion at a plurality of locations in a gap between a section of a reinforced concrete structure and another solid structure is provided. Each anode assembly comprises an expandable member, an anode attached to the expandable member for protecting a steel reinforcement in the reinforced concrete structure, and an anode connector for interconnecting the array of anode assemblies. During use, each anode assembly of the array of anode assemblies is inserted into the gap, between the section of the reinforced concrete structure and the solid structure, at the plurality of locations. The expandable member of each anode assembly is configured to expand so as to press the anode into contact with a surface of the reinforced concrete structure.

A method of making cerium citrate includes combining cerium carbonate and citric acid to produce cerium citrate and carbon dioxide. The cerium citrate is substantially free of negative ions other than citrate. The cerium citrate can be used in a corrosion inhibitor composition.

A method of making cerium citrate includes combining cerium carbonate and citric acid to produce cerium citrate and carbon dioxide. The cerium citrate is substantially free of negative ions other than citrate. The cerium citrate can be used in a corrosion inhibitor composition.

Systems and methods for providing and monitoring corrosion protection are disclosed. The system can include a sacrificial passive anode and a reference electrode. The sacrificial anode and the reference electrode can both be in communication with a component that is subject to corrosion and the liquid contained therein. The sacrificial anode can be electrically connected to the component with a bonding wire. The reference electrode can be electrically connected to an electronic measurement device and the component. As the sacrificial anode is depleted the voltage of the system drops. The difference in the voltage can be monitored over time and can be used in various algorithms to calculate a protection level based on the amount of sacrificial anode remaining. When the protection level drops below a predetermined level, an alert can be provided to inform a user that the sacrificial anode needs to be replaced.

Systems and methods for providing and monitoring corrosion protection are disclosed. The system can include a sacrificial passive anode and a reference electrode. The sacrificial anode and the reference electrode can both be in communication with a component that is subject to corrosion and the liquid contained therein. The sacrificial anode can be electrically connected to the component with a bonding wire. The reference electrode can be electrically connected to an electronic measurement device and the component. As the sacrificial anode is depleted the voltage of the system drops. The difference in the voltage can be monitored over time and can be used in various algorithms to calculate a protection level based on the amount of sacrificial anode remaining. When the protection level drops below a predetermined level, an alert can be provided to inform a user that the sacrificial anode needs to be replaced.

A brazing sheet (1) includes a core material (11) composed of an Al alloy containing 0.40-2.50 mass % Mg; and a filler material (12) composed of an Al alloy containing Mg, 6.0-13.0 mass % Si, and 0.010-0.050 mass % Bi. The filler material is layered on a side of the core material and is exposed at an outermost surface (121). The Mg concentration in the filler material continuously decreases in a direction from a boundary (122) with the core material toward the outermost surface. The Mg concentration (c.sub.1/8) is 0.080 mass % or less at a depth (position P.sub.1/8) from the outermost surface that is ⅛ of the thickness t.sub.f of the filler material (12). The Mg concentration (c.sub.7/8) is 15-45% of the amount of Mg in the core material at a depth (position P.sub.7/8) from the outermost surface that is ⅞ of the thickness t.sub.f of the filler material.

A main object of the present disclosure is to provide a fuel cell system capable of inhibiting corrosion of components due to a stray current in a structure of connecting a plurality of fuel cells in series. The present disclosure achieves the object by providing a fuel cell system including a fuel cell, a coolant circuit that circulates a cooling liquid to cool the fuel cell; wherein the fuel cell system includes: as the fuel cell, at least a first fuel cell and a second fuel cell; and as the coolant circuit, at least a first coolant circuit that cools the first fuel cell, and a second coolant circuit that cools the second fuel cell; and the first fuel cell and the second fuel cell are connected in series in a manner the first fuel cell is in a low potential side and the second fuel cell is in a high potential side; the first coolant circuit and the second coolant circuit are respectively connected to a grounding member interposing a first connecting member and a second connecting member; the first coolant circuit includes a sacrifice corrosion member; and the sacrifice corrosion member contacts the first connecting member.

A main object of the present disclosure is to provide a fuel cell system capable of inhibiting corrosion of components due to a stray current in a structure of connecting a plurality of fuel cells in series. The present disclosure achieves the object by providing a fuel cell system including a fuel cell, a coolant circuit that circulates a cooling liquid to cool the fuel cell; wherein the fuel cell system includes: as the fuel cell, at least a first fuel cell and a second fuel cell; and as the coolant circuit, at least a first coolant circuit that cools the first fuel cell, and a second coolant circuit that cools the second fuel cell; and the first fuel cell and the second fuel cell are connected in series in a manner the first fuel cell is in a low potential side and the second fuel cell is in a high potential side; the first coolant circuit and the second coolant circuit are respectively connected to a grounding member interposing a first connecting member and a second connecting member; the first coolant circuit includes a sacrifice corrosion member; and the sacrifice corrosion member contacts the first connecting member.