Stone vomiting yellow phenomenon clearance and prevention

Who spit stone for stone industry yellow, rust and straw printing phenomenon should be fully understood, since most people relatively weak notion of stone conservation and other well-known reasons, tend to wait until there is a problem project uses "Which pain doctors Which "approach to remedy, why we do not take" preventive measures "approach to eliminate the problem happen?

      First, we should understand the reasons for the stone vomiting yellow and rust phenomenon.
      1. Stone higher raw material iron content (such as the American white linen), carbon dioxide and water in the air invade the stone surface, iron and stone interior of the reaction generates two iron, and discharged through the stone pores to form the macula.
      2. Sawn stone in the process of surface residual iron, such as by water washing is not clean, long-term storage and the formation of rust.
      3. Rust caused by rusty anchor bars.
      4. Stone finished using rope tied packaging, water or moisture, long-term storage or long-distance transportation, easily lead to stone discoloration.
      5. Hang wet stone installation, cement mortar during the curing process, through the pores of the stone mortar pigment discharge stone surface, forming a stain, especially light-colored or white stone (such as jazz white, Aston white, beige Spain) most prone this phenomenon.

      Clear vomiting yellow stone above phenomena can be divided into physical removal and chemical purge two kinds.

      Physical removal: polishing abrasive wear off the macula. However, this method is more suitable for the flat stone is not yet installed, for stone or shaped stone installed little meaning, and material and labor costs.

      Chemical clear: we all know, the main ingredient is a mixture of rust iron hydroxide and iron hydroxide II. Materials and methods so as long as the correct use of chemical purge is the most convenient and economical. Traditional chemical cleaning agents there are two, that is, from hydrochloric acid, corrosion inhibitors, mist Yang preparations, hydrochloric acid and oxalic acid rust remover Rust (saturated solution of oxalic acid prepared) activation agent formulated. These two advantages are clean, low cost, but if not promptly treated water for washing or flushing is not complete, often counterproductive, untreated non-yellowing, treated the place but "relapse", serious damage to the stone It glosses.

      Stone descaling agent currently on the market of imported and domestic brands of many, because our research and development work in this area started late products, product quality and effect to be further improved and enhanced. Here we have the German company AKEMI stone rust agents and related products, for example, put some of my experiences and usage raised for discussion with you.

      AKEMI Rust Remover is a free hydrochloric acid scavenger, which is mainly composed of a nonionic primary surfactant and preservatives, of which the surfactant contains corresponding biodegradable detergents, can penetrate the stone surface hydroxide iron and iron hydroxide and the two converted into other substances, rather than as we imagine the rust wash. It spit yellow American white linen effect was particularly evident, but again excellent products also have the right to use, we after nearly four years of application, has accumulated some experience.

      Stone factory use: the rust remover evenly coated in a clean dry stone large plate finishes and four sides, then two stone finishes stand face stickers (this can save a veneer of rust dosage), When the paste approximately 10-12 pieces of slate, with polyethylene film in advance to pave the way for the slate covered and sealed with adhesive tape holding 12-24 hours, then water thoroughly washed finishes and four sides.