The process includes a HF/U2SO4 pre-pickle and a UF/U2SO4/U2O2 pickling step.
Pickling preparations for metal surfaces
Pickling preparations for metal surfaces
Acid pickling of a metal uses a first acid and forms a spent pickling liquor (SPL).
The pickling is performed in an electrochemical way.
The present invention provides a process for the removal of hydrogen peroxide from spent pickle liquor used in a steel strip pickling process.
Regenerated hydrochloric acid is recycled to the acid pickling process.
However, it has been found that after the pickling process, the pH at the surface of the part is less than 1.
During the pickling processes, adhering layers, oxide films and other corrosion products are removed by chemical reaction with an acid-based pickling agent.
In addition, the installation of new equipment will improve the pickling process by adding pickling to the steel ball, a new service that the company will also offer as a subcontractor.
machinery for scouring or pickling metals
Safe surface scouring is thus possible.
Also bleach and scouring pads (such as Scotch Brite®).
The CC 1200 dome is the ideal tool for scouring difficult to access zones.
Parts of the ditch located at the western end are no more than thirty centimetres under the level of scouring (0,70 metre under the surface of the ground) while the others can be as deep as 1,30 or 2 metres under this same scouring.
The chemical treatment preferably comprises an etching treatment using hydrofluoric acid and capable of controlling the roughness by regulating the concentration of the hydrofluoric acid and etching time.
Or are there self-regulating mechanisms which will slow, halt, or even reverse the process?
Disclosed is a resist stripping agent which has excellent stripping properties, which has no flammability and therefore is safe, and which does not cause corrosion of a conductive material and therefore has excellent anti-corrosion properties.
A fresh stripper liquid is suitably added to the stripper liquid from which the resist components have been removed, and the resultant stripper liquid is reused in the stripping step.
The present method is a method of electrochemical stripping analysis comprising an electrolysis step and a stripping step.
The stripping nozzles with flow of fluid loaded with solid particles can form a C- or D-shaped stripping front, causing a difference in stripping efficacy.
This invention concerns paint stripping compositions which are particularly suitable for stripping paint off aircraft.
Thus you can determine your desired speed without the hassle of dipping, scraping and spilling.
After cooling, the steel strip is subjected to a surface treatment such as mechanical de-scaling and/or etching.
This material is cold rolled followed by softening and de-scaling.
Disclosed is a dry etching method which enables to reduce etching products in the etching process and improve in-plane uniformity with respect to the etching object.
A robot blaster is positioned at the end of the extendable arm and performs the media blasting.
The etching rate ratio between palladium and gold (etching rate of palladium/etching rate of gold) is not less than 1.
The etching result is measured and at least one etching parameter (TZ,TA,v,cS,cFe,B,p) is automatically modified according to the measurement of the etching result in order to improve etching performance.
The etching method is characterized in that a perfluorocarbon gas is used as an etching gas.
The constriction (23) defines an aperture (24) of the via hole (9) and the method further comprises the step of opening the via hole (9) by etching, with the constriction (23) functioning as an etch mask.
A sputter etch system and a method of conducting a sputter etch is disclosed.
The continuous strip is then subjected to a downstream modifying process which comprises a primary pickle and a secondary pickle; and in a final treatment stage in the hot dip coating part, guiding the continuous strip through a melt bath.
The method further includes performing thick wiring using selective etching while continuing via etching to at least one etch stop layer (22).
The invention provides a self etching adhesive dental primer composition, a method of use of the primer composition and a product formed from the primer.
The aim of the invention is to carry out the pickling method, taking into account not just the usual parameters, but also additional parameters from outside the pickling bath.
flame priming using a phosphating solution
Then, a second reactive ion etch recipe containing O2 to etch away the photoresist.
A strip rate for a strip tool (130) adapted to remove the anti-reflective coating (240) is determined.
Before the etching takes place, a protective film, comprising patterns corresponding to the electrodes in the network, is applied, said film being removed after etching.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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