The present invention includes an etching agent that selectively etches a copper layer of a processing target in which a noble metal layer containing a metal nobler than copper and the copper layer coexist, the etching agent including: a copper ion; one or more nitrogen-containing compounds selected from the group consisting of a heterocyclic compound having two or more nitrogen atoms in a ring and an amino group-containing compound having 8 or less carbon atoms; a polyalkylene glycol; and a halogen ion, in which the polyalkylene glycol is contained in an amount of 0.0005% by weight or more and 7% by weight or less, and the halogen ion is contained in an amount of 1 ppm or more and 250 ppm or less.

A process for preparing an anticorrosion component for an antifreeze by oxidizing an oxydiol of the formula (I) ##STR00001##
with molecular oxygen at a temperature of 20 to 100 C. and a partial oxygen pressure of 0.01 to 2 MPa in the presence of water and of a heterogeneous catalyst. The catalyst contains platinum to form an oxydicarboxylic acid of the formula (II) ##STR00002##
The process has the steps of conducting the oxidation
(a) at a molar ratio of
0.002n(Pt)/[n(oxydiol (I))+n(oxydicarboxylic acid (II))]0.019;
(b) at a concentration of water of 50% to 95% by weight in the liquid phase; and
(c) at a pH of 1 to 7.

Provided herein is a composition for treating aluminum containing surfaces, wherein the composition includes a reaction product of at least one amine-functionalized organosilane and/or oligomer and/or polymer thereof and at least one fatty acid, wherein the molar ratio of the amino group/s of the at least one amine-functionalized organosilane and/or oligomer and/or polymer thereof and of the at least one fatty acid is 1.2:1 to 1:2, and wherein the at least one amine-functionalized organosilane and/or oligomer and/or polymer thereof is linked to the at least one fatty acid by at least one carboxylic acid/amine salt bond and/or at least one amide bond.

Disclosed are curable coating compositions, and methods of cathodic corrosion protection using the compositions. For example, a curable coating composition comprising a mixed salt of magnesium thiodialkanoate, and a method for applying the coating composition, which when applied onto a steel or other ferrous substrate provides an anticorrosive coating, effective for improving resistance to cathodic disbondment.

A carbon steel main body defines a flow passage. The carbon steel main body includes an end. The carbon steel main body includes a beveled edge at the end. A corrosion resistant cladding is deposited along an inner surface of the carbon steel main body. The corrosion resistant cladding extends from the end to a distance into the carbon steel main body.

A carbon steel main body defines a flow passage. The carbon steel main body includes an end. The carbon steel main body includes a beveled edge at the end. A corrosion resistant cladding is deposited along an inner surface of the carbon steel main body. The corrosion resistant cladding extends from the end to a distance into the carbon steel main body.

A tubular includes a carbon steel main body defining a first flow passage. The carbon steel main body includes a first end and a second end. The carbon steel main body includes a beveled edge at the first end of the carbon steel main body. A corrosion resistant pup defines a second flow passage in-line with the first flow passage. The corrosion resistant pup includes a substantially same inner diameter and outer diameter as the carbon steel main body. The corrosion resistant pup includes a first end and a second end. The corrosion resistant pup includes a first beveled edge at the first end. The corrosion resistant pup is connected to the carbon steel main body by a weld along the beveled edge of the carbon steel main body and the beveled edge of the corrosion resistant pup.

According to one embodiment of the present disclosure, a method of forming an ultraviolet-stabilized corrosion inhibitor is provided. The method includes forming a functionalized azole; forming a functionalized photosensitizer; and forming an ultraviolet-stabilized corrosion inhibitor by reacting the functionalized azole with the functionalized photosensitizer. In another embodiment, an ultraviolet-stabilized corrosion inhibitor is provided. The inhibitor includes an azole bonded to a photosensitizer. In another embodiment, an article of manufacture is provided. The article of manufacture includes a material comprising a reaction product of an azole and a photosensitizer.

According to one embodiment of the present disclosure, a method of forming an ultraviolet-stabilized corrosion inhibitor is provided. The method includes forming a functionalized azole; forming a functionalized photosensitizer; and forming an ultraviolet-stabilized corrosion inhibitor by reacting the functionalized azole with the functionalized photosensitizer. In another embodiment, an ultraviolet-stabilized corrosion inhibitor is provided. The inhibitor includes an azole bonded to a photosensitizer. In another embodiment, an article of manufacture is provided. The article of manufacture includes a material comprising a reaction product of an azole and a photosensitizer.

The invention comprises synergistic compositions of at least one metal polycarboxylate and lithium phosphate. The synergistic compositions are designed to be added to film-forming or other compositions to reduce the corrosion of various metal surfaces or substrates on which the synergistic compositions are applied.