Abstract

Cleaning bath for parts made of an alloy of metals comprising aluminium and/or nickel and/or iron and/or titanium and/or copper. This bath comprises water, an anionic surfactant, a nonionic surfactant, a corrosion inhibitor suitable for forming, on each metal alloy part removed from the bath, a layer that limits the corrosion of these parts, a pH agent suitable for limiting the variation of the pH of the cleaning bath, this bath having a weight concentration of anionic surfactant and of nonionic surfactants of less than 3%.

IPC Classes  ?

• C23G 1/14 - Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
• C23G 1/16 - Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions using inhibitors
• C11D 11/00 - Special methods for preparing compositions containing mixtures of detergents
• C11D 3/12 - Water-insoluble compounds
• C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
• G01N 27/06 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
• G01N 33/18 - Water
• C23G 1/00 - Cleaning or pickling metallic material with solutions or molten salts
• C23G 3/00 - Apparatus for cleaning or pickling metallic material

Abstract

Method for evaluating the capacity of a cleaning bath containing at least one anionic or ionic surfactant to carry out a role of deoiling parts, in which: a sample is withdrawn from the bath and the amount of acid needed in order for this sample to achieve a neutral pH is measured; the oil content of the bath to be evaluated is evaluated; the surfactant content of the bath is evaluated; then, as a function of the evaluated oil content of the bath to be evaluated, of the evaluated surfactant content of the bath to be evaluated and of a predetermined rule, the current capacity of the bath to fix oil in the form of micelles with the aid of surfactants that it contains is verified.

IPC Classes  ?

• C23G 1/00 - Cleaning or pickling metallic material with solutions or molten salts
• G01N 27/06 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
• C23G 3/00 - Apparatus for cleaning or pickling metallic material
• C23G 1/14 - Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
• C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
• C11D 11/00 - Special methods for preparing compositions containing mixtures of detergents
• G01N 33/18 - Water
• G01N 15/02 - Investigating particle size or size distribution

Abstract

Method for evaluating the capacity of a cleaning bath containing at least one surfactant to carry out a role of deoiling parts, in which: the size of micelles contained in the bath is evaluated, these micelles being at least partially formed from said surfactant; and the capacity of said bath to absorb oil is evaluated as a function of the sizes of micelles evaluated.

IPC Classes  ?

• C23G 1/00 - Cleaning or pickling metallic material with solutions or molten salts
• C23G 1/14 - Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
• G01N 15/02 - Investigating particle size or size distribution
• C11D 11/00 - Special methods for preparing compositions containing mixtures of detergents
• G01N 27/06 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
• C23G 3/00 - Apparatus for cleaning or pickling metallic material
• C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals

Abstract

Device (1) for regulating a cleaning bath (B) for metal alloy parts (P) comprising: a bath (B) comprising surfactants (SDS, Tween80); a tank (2) in which the bath (B) is placed, this tank being intended to receive parts (P) to be cleaned. The regulating device (1) comprises: a system (3) for measuring physical parameters of the bath(B) that are representative of its capacity to form micelles with surfactants of the bath and oil present in the bath (B); a means (4) for metering surfactant into the bath (B) suitable for controlling the pouring of an amount of surfactant into the bath as a function: of measurements of physical parameters (K, pH, Sniv) measured by the measurement system; and of preestablished metering rules.

IPC Classes  ?

• C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
• C23G 3/00 - Apparatus for cleaning or pickling metallic material
• C23G 1/14 - Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
• C23G 1/00 - Cleaning or pickling metallic material with solutions or molten salts
• C11D 11/00 - Special methods for preparing compositions containing mixtures of detergents
• G01N 15/02 - Investigating particle size or size distribution
• G01N 27/06 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
• G01N 33/18 - Water