A method for anti-corrosion coating of metal components, in series, comprising a plurality of wet-chemical treatment steps concluding in cathodic electrodeposition, in which method each component is received by a conveying rack; then the component and conveying rack proceed through all treatment steps; the finished coated component is separated from the conveying rack; and an uncoated component is then received by the same conveying rack for coating; wherein build-up of solid coating deposits on the conveying rack is prevented by using an additional treatment step before cleaning/degreasing, passivation and electrodeposition, thereby avoiding extraction of individual conveying elements for removing coating deposits; wherein removal of cathodic electrodeposition coating constituents from conveying racks is achieved by contacting the conveying racks carrying components to be coated with an aqueous acidic agent, containing phosphoric acid, before the wet-chemical treatment steps for cleaning/degreasing, passivation and cathodic electrodeposition.

Embodiments of the present disclosure provide a surface treatment composition and methods for using same. The composition for removing contaminants from a metallic surface, can include 3 wt % to 40 wt % of at least one bifunctional alkaline compound, 0.03 wt % to 10 wt % of at least one oxidizer comprising a metal salt, and water, where all weight percentages are based on the total weight of the composition.

Embodiments of the present disclosure provide a surface treatment composition and methods for using same. The composition for removing contaminants from a metallic surface, can include 3 wt % to 40 wt % of at least one bifunctional alkaline compound, 0.03 wt % to 10 wt % of at least one oxidizer comprising a metal salt, and water, where all weight percentages are based on the total weight of the composition.

A method of removing a ceramic coating from a ceramic coated metallic article without damaging the metallic bond coating, the metallic article having a first and second portions, each of the portions comprising a metallic bond coating and a ceramic coating on the metallic bond coating, the ceramic coating on the second portion being less porous than the ceramic coating on the first portion. The method comprises the steps of a) immersing the ceramic coated metallic article in a caustic solution; b) maintaining the ceramic coated metallic article in the caustic solution at atmospheric pressure for a predetermined time period and at a predetermined temperature; c) removing the ceramic coated metallic article from the caustic solution; d) rinsing the ceramic coated metallic article in water at ambient temperature; e) water jet blasting the first portion of the metallic article to remove the ceramic coating; and f) water jet blasting the second portion of the metallic article to remove the ceramic coating.

The present disclosure relates to compositions and methods for the removal of deposits from oilfield apparatus and wellbore surfaces. In particular, removal of deposits comprising heavy hydrocarbon materials and finely divided inorganic solids. The composition includes a mixture of a corrosion inhibitor component which is morpholine or a morpholine derivative having corrosion inhibitor properties, and a surfactant which is a quaternary ammonium compound having biocidal properties. Methods of removing a deposit from a surface or unplugging an oilwell which has been plugged with a deposit, are also included wherein the method comprising contacting the deposit with a composition as disclosed herein for a selected period of time.

The present disclosure relates to compositions and methods for the removal of deposits from oilfield apparatus and wellbore surfaces. In particular, removal of deposits comprising heavy hydrocarbon materials and finely divided inorganic solids. The composition includes a mixture of a corrosion inhibitor component which is morpholine or a morpholine derivative having corrosion inhibitor properties, and a surfactant which is a quaternary ammonium compound having biocidal properties. Methods of removing a deposit from a surface or unplugging an oilwell which has been plugged with a deposit, are also included wherein the method comprising contacting the deposit with a composition as disclosed herein for a selected period of time.

Continuous annealing equipment (1) including a cleaning device (11, 12) for performing a cleaning treatment on a steel strip (S) and an annealing device (12) for performing an annealing treatment on the steel strip (S) comprises an exhaust gas passage (31, 41) through which an exhaust gas discharged from the annealing device (12) flows, a solution circulation passage (32, 51) through which a cleaning solution used in the cleaning device (11, 12) circulates, and a heat exchanger (53) which forms a part of the solution circulation passage (32, 51) and contacts with the exhaust gas.

The present disclosure is directed to wipes that include aqueous compositions and methods for coating, particularly protecting and optionally cleaning, surfaces, particularly metallic surfaces.

The present invention is in the field of chemical cleaning and surface treatments for a stainless steel substrate. In particular, the present invention provides a method, kit and use of specific solutions for removing and preferably preventing the formation of rouging (e.g. class I, II and/or III) on a stainless steel substrate, which may be used as processing station or production unit.

The present invention provides a composition for cleaning a mask comprising a) 0.2 to 10% by weight of two or more alkali compounds selected from alkali hydroxides and alkali carbonates, b) 0.1 to 8% by weight of nitrate, c) 1 to 8% by weight of an oxidizer, and d) residual water, wherein the pH is 11.5 to 14.

According to the present invention, a composition for cleaning a mask and a method for cleaning a mask using the same, which can remove only the film deposited on the mask in a short time without damaging the mask, was provided.