This invention covers a formulation providing protection against corrosion in liquid and vapor phase. Such formulations are used in applications where engine parts or fuel cell systems are subjected to a running-in or hot-test prior to final assembly or storage. The invention includes a concentrate as well as a dilute solution. The synergistic combination of inorganic ammonium derivatives in combination with monocarboxylic or dicarboxylic acids increases the period of protection. This enables storage for a longer period when the engine parts are shipped or stored prior to assembling. The use of the described invention pre-conditions the metal surface and provides protection even if afterwards the liquid is almost completely removed.

A process based on the combined use of yttrium and magnesium to inhibit vanadium corrosion of high temperature parts of thermal equipment. The combined use of yttrium and magnesium, applied in a variable yttrium/magnesium ratio, compared with conventional magnesium inhibition, may reduce emission of magnesium vanadate and minimize losses of performance due to fouling of the high temperature parts, including in the presence of alkali metals. Further, compared with inhibition based on yttrium alone, it may reduce the inhibition cost and reinforce the protection against combined vanadium pentoxide and sodium sulfate corrosion.

A sealing process includes impregnating an oxide layer of an anodized metal with a corrosion inhibitor by contacting the oxide layer with a first corrosion inhibitor solution at a first temperature and sealing the impregnated oxide layer of an anodized metal by contacting the impregnated oxide layer with a second corrosion inhibitor solution at a second temperature, wherein the first corrosion inhibitor solution has a corrosion inhibitor concentration greater than the second corrosion inhibitor solution and the first temperature is less than the second temperature.

Compositions for inhibiting the corrosion of metals in contact with an aqueous system are provided. The corrosion inhibiting compositions may be used to maintain effective amounts of (1) an amino acid-based polymer, such as a polyaspartic acid compound, and (2) a dispersible and/or soluble tin compound in the aqueous system. The corrosion inhibiting compositions include the amino acid-based polymer and a dispersible and/or soluble tin compound and may optionally include a polycarboxylic acid chelating agent and/or a carboxylate/sulfonate functional copolymer.

A system for protecting storage tank soil side bottoms against corrosion includes a pipe system comprising non-perforated inlet pipes and perforated pipes connected thereto. A sleeve container having solid VCI compounds therein is inserted into the perforated pipes. The sleeves are permeable to vapors emitted by the solid VCI compounds and flow through the pipe to a perforation where they are admitted into an area beneath a storage tank so that they can contact the tank bottom (soil side) and protect the same from corrosion. Alternatively, solid SCI compounds can be used in combination with VCI compounds. The corrosion protection system is designed to be used with aboveground storage tanks. This includes, but is not limited to, single bottom tanks: newly installed or existing tanks undergoing bottom replacement or installation of double bottoms. These tanks are located on substrates such as the compacted soil/sand or hard substrates such as concrete, bitumen mixtures and asphalt where channels can be cut into the substrate for installation of the pipe system.

Compositions and methods for inhibiting the corrosion of metals in contact with an aqueous system are provided. For example, the corrosion inhibitor composition of the present embodiments can include an oxyanion of an amphoteric material, a silicate, and an additional component. The corrosion inhibitor can be substantially phosphate free or free of phosphorus. The additional component can include, for example, a hydroxycarboxylic acid.

This invention relates to a corrosion protection pretreatment agent, which comprises a solvent, at least one inorganic inhibitor, at least one silane compound, and a bi-functional epoxy resin precursor (C); the invention also provides a method for treating metallic surface by using the corrosion protection pretreatment agent, an article which has at least one portion comprising a surface treated by the corrosion protection pretreatment agent that demonstrates improved corrosion resistance, adhesion properties and impact resistance.

A method of making superhydrophobic concrete includes creating a mixture, wherein the mixture comprises aragonite and/or graphene, and heating the mixture to a temperature between 500 C. and 2,500 C., then drying the mixture, and, optionally, adding the mixture to concrete.

Disclosed is a stabilization treatment liquid for a 690 MPa-grade weather-resistant bridge steel member. The content in percentage by mass of each component of the stabilization treatment liquid is as follows: the content of ferric trichloride is 3-7%; the content of sodium bisulfite is 1-2%; the content of chromium sulfate is 3-6%; the content of potassium permanganate is 1-4%; the content of polypropylene glycol is 1-2%; the content of sodium carboxymethyl cellulose is 2-5%; and the remainder is deionized water. Also provided is a method for performing stabilization treatment by using the stabilization treatment liquid. According to the present invention, stabilization treatment for a rust layer of a 690 MPa-grade weather-resistant bridge steel member can be achieved, and after treatment, a brown rust layer having uniform color and no rust liquid flow is formed on the surface of the 690 MPa-grade weather-resistant bridge steel member.

Methods and compositions for suppressing corrosion of a corrodible metal surface that contacts a water stream in a water system. The method comprises introducing into the water stream a treatment composition, the treatment composition including a combination of passivators and a hydroxycarboxylic acid promoter.