

AUJOR
About us
At AUJOR, we specialise in stainless steel surface treatments. We help industrial companies improve the corrosion resistance, cleanliness, finish and performance of their components, equipment and installations, with solutions tailored to each application.
Our core services are pickling, passivation and electropolishing: processes that remove oxides and contaminants, support corrosion protection, and produce smoother surfaces that are easier to clean. Our wider treatment portfolio includes derouging, NER-INOX blackening, Sublimotion Process®, mechanical polishing and abrasive blasting, and biological cleaning for biofilm removal.
Treatment at our facilities and on site
We treat everything from individual components and manufactured parts to large equipment, including tanks, reactors, heat exchangers and pipework. We work both at our own facilities and at customers’ premises using mobile units, adapting each intervention to the dimensions, geometry and operating conditions of the project. We also treat circuits through chemical recirculation and carry out work on installed equipment.
We serve the pharmaceutical and biotechnology, wine, food and beverage, cosmetics, chemical, automotive, aerospace, medical and nuclear industries, as well as machinery manufacturers, engineering companies and architectural projects.
Our processes follow the applicable technical standards and customer specifications. These include ASTM A380, ASTM A967, AMS 2700 and UNE-EN 2516 for cleaning and passivation, and ASTM B912 and ISO 15730 for electropolishing, alongside ASME BPE requirements where relevant to the application. Process control and technical documentation provide traceability and support each project’s quality requirements.
Products, equipment and support for your own treatment processes
We supply products for the different stages of stainless steel treatment: degreasers, pickling and passivation products, electropolishing electrolytes, derouging products, neutralisers, cleaning and finishing products, and quality control tests. We also offer a dedicated range for the nuclear industry.
Our supply offering includes personal protective equipment (PPE), machinery, application equipment, accessories and spare parts. Through technical advice and staff training, we help customers select products, define application methods and choose the appropriate equipment for effective and safe processes. We also advise on the implementation and optimisation of treatment lines.
Official TIG Brush® distributors in Spain
We distribute TIG Brush®, the technology developed by Australian manufacturer Ensitech and used internationally for the electrochemical cleaning and passivation of stainless steel welds. Its equipment, fluids and accessories remove weld oxides and heat tint and, with the appropriate configuration, enable permanent marking through printing or etching.
Backed by years of Ensitech research and development, TIG Brush® complements our offering with a solution for weld treatment and localised finishing, both in the workshop and at customers’ premises, supported by AUJOR’s technical advice and training.
We combine practical treatment expertise with the supply of products and technology to help every company find the right solution for its stainless steel.
Products & services

PICKLING
Removal of oxides and welding marks to restore a clean and uniform stainless steel surface.

ELECTROPOLISHED
Reduction of the roughness of stainless steel to obtain bright, uniform and easy-to-clean surfaces.

PASSIVATED
Protection of stainless steel against corrosion through a controlled passivation treatment.

DEROUGING
Elimination of rouging on stainless steel equipment to restore the cleanliness of its surfaces.

NER-INOX
Uniform black finish on stainless steel through controlled oxidation, without adding paints or coatings.

SUBLIMOTION PROCESS
Uniform satin finish on stainless steel through a wet phase process that facilitates cleaning.

BIOLOGICAL CLEANING AND BIOFILM REMOVAL
Elimination of biofilm and microbiological contamination in stainless steel equipment and circuits.

POLISHING AND BLASTING
Mechanical treatments of stainless steel to improve uniformity, hygiene and surface finish.

LARGE-SCALE TREATMENTS
Pickling, passivation and electropolishing of large stainless steel equipment, at our facilities or on site.

ON-SITE SERVICES
Stainless steel treatments at the customer's premises using specialized mobile units.

STAINLESS STEEL TREATMENT PRODUCTS
Chemical products for each phase of stainless steel treatment, with expert technical advice.

TIG BRUSH
Ensitech technology for cleaning and passivating stainless steel welds, with marking and engraving options.

PPE AND EQUIPMENT FOR STAINLESS STEEL TREATMENT
PPE, accessories and spare parts to protect the operator and facilitate the application of stainless steel treatments.
News

AUJOR contributes to stainless steel treatment for the central towers of the Sagrada Família
Our expertise in pickling and passivation of super duplex stainless steel has contributed to one of the world's most iconic architectural projects.

AUJOR completes surface treatment of a 23-tonne stainless steel industrial reactor
A 15-metre-long, 23-tonne reactor demonstrates AUJOR's technical capabilities in specialised surface treatments for large-scale industrial equipment.

AUJOR earns EcoVadis Bronze Medal, ranking among the top 35% of assessed companies
The 2026 EcoVadis Bronze Medal places AUJOR among the top 35% of assessed companies, recognising our commitment to sustainability and responsible business practices.