Чем опасна пескоструйная очистка?

A number of techniques are available for preparing and cleaning different surfaces. Of all these techniques, sandblasting has traditionally been one of the best known and most widely used methods of surface preparation. Sandblasting propels a mixture of sand and compressed air at high pressure onto the surface to be prepared or cleaned. Because of the force with which the sand strikes the surface, mill scale, dirt and coatings are removed, and the impacts leave a roughened texture (anchor profile) that helps a new coating adhere. Despite these advantages, sandblasting has serious drawbacks — above all for the health of the people doing it. This article explains why sandblasting is dangerous, which health risks it carries, how exposure is regulated, and which alternatives avoid the abrasive altogether.

Is sandblasting dangerous?

Sandblasting is a cleaning and preparation technique that has been used for well over a century. In the beginning, natural quartz sand was used extensively, which is how the term "sandblasting" originated. Despite how effective quartz sand is at cleaning and preparing steel and other surfaces, its disadvantages became clear over the years: working with quartz sand turned out to be very harmful to human health.

As a result, the use of silica sand as a blasting abrasive has been restricted in many places. According to NIOSH, Great Britain restricted the use of silica sand for abrasive blasting in 1949, and the countries of the then European Economic Community have restricted it since 1966. In the United States, silica sand is not banned outright, but exposure to respirable crystalline silica is tightly regulated. Today, most abrasive blasting uses lower-silica media such as mineral slags, garnet or steel grit and shot, whereas natural quartz sand consists largely of crystalline silica.

What makes sandblasting dangerous?

To understand what makes sandblasting dangerous, we need to look at the composition of the sand. Natural sand, which was commonly used in the early days of sandblasting, contains crystalline silica (quartz). When the sand shatters on impact, it produces fine quartz dust. Inhaling this dust can cause silicosis, among other diseases. Silicosis is one of the oldest and best-known occupational diseases, historically associated with mining and quarrying as well as sandblasting.

The problem lies in the minuscule particles of quartz released during blasting. Once inhaled, these respirable particles reach deep into the lungs, where they cause inflammation and scarring (fibrosis). One of the great dangers of silicosis is that it often develops slowly and goes unnoticed for years. What starts with mild lung complaints and a persistent cough can gradually develop into severe shortness of breath. By the time silicosis is diagnosed, the damage is done: OSHA describes silicosis as an incurable lung disease that can lead to disability and death. Prevention is the only effective protection.

Another major problem with quartz particles is that they are very small and practically invisible. Operators wear blast helmets and protective clothing, but the dust remains a hazard for everyone on site. Because of their small size, the particles stay suspended in the air for a long time — even after blasting has stopped. This means that not only the person blasting is at risk: other people in the vicinity can unknowingly inhale the particles without any protection.

What are the other health risks of sandblasting?

Silicosis is the best-known consequence of working with quartz sand, but it is not the only health risk. OSHA lists lung cancer, chronic obstructive pulmonary disease (COPD) and kidney disease alongside silicosis as diseases linked to respirable crystalline silica. And the abrasive is not the only source of dust: blasting also pulverizes the rust and coatings being removed. Where old coatings contain lead or hexavalent chromium, that dust brings its own hazards. The health risks of sandblasting include:

• Irritation of the eyes, nose and throat
• Silicosis — scarring of the lungs that is irreversible
• Lung cancer — respirable crystalline silica is a recognized carcinogen
• Chronic obstructive pulmonary disease (COPD), including chronic bronchitis, with coughing, chest tightness and shortness of breath
• Kidney disease
• Nervous system and brain effects where lead-containing coatings are blasted — OSHA links lead exposure to neurological and cognitive effects

In addition, blasting involves high-pressure equipment and high noise levels, which require their own controls.

How is silica exposure regulated?

Because the risks are well documented, exposure to respirable crystalline silica is regulated in most industrial countries:

• United States: OSHA's construction standard (29 CFR 1926.1153) sets a permissible exposure limit of 50 µg/m³ as an 8-hour time-weighted average, with an action level of 25 µg/m³. Employers must assess exposure, use engineering controls and work practices, provide respiratory protection where needed and offer medical surveillance to exposed workers.
• European Union: Directive (EU) 2017/2398 lists work involving exposure to respirable crystalline silica dust generated by a work process as carcinogenic and sets a binding occupational exposure limit of 0.1 mg/m³.

Meeting these limits during open blasting typically requires low-silica abrasives, containment, ventilation or dust collection, supplied-air blast helmets and exclusion zones for other workers. For coatings that may contain hexavalent chromium, see our page on removing chromium-6 coatings safely.

The alternative to sandblasting: Bristle Blaster® and MBX®

Because of these health risks and the restrictions on silica sand, various alternatives for preparing and cleaning surfaces have been developed. MontiPower®'s hand-held power tools use patented rotating belts of wire bristles instead of a loose abrasive, which makes them a practical alternative to sandblasting for many jobs:

• The Bristle Blaster® is designed for steel. It removes rust, coatings and mill scale and creates an anchor profile in a single pass — in documented tests, cleanliness comparable to ISO 8501-1 Sa 2½ / SSPC-SP 10 with a 65–85 µm Rz profile on standard steel. Results vary with steel grade, rust grade, belt and technique.
• The MBX® is designed for vehicle bodywork and panels. It removes rust, paint, underseal and sealants without heat or warping; it is not intended for profiling structural steel.

Because no sand or other abrasive is used, there is no silica-laden abrasive cloud, no spent media to collect and no blast containment to build. That does not make the work dust-free: the rust and coating removed from the surface still become particles, so extraction and respiratory protection chosen from the site risk assessment remain necessary. See surface preparation safety for how grit-free preparation handles dust, operator exposure and ATEX zones. On large, open new-build areas in a blast shop, abrasive blasting with low-silica media and proper controls is still often the most productive choice; grit-free tools come into their own on spot repairs, weld seams, in-service assets and areas where blasting is impractical. For a comparison of terms and methods, read sandblasting vs. abrasive blasting.

Frequently asked questions

Why is sandblasting with silica sand dangerous?

Quartz sand shatters on impact into fine respirable crystalline silica dust. Inhaled, it scars the lungs and causes silicosis, an incurable disease that can lead to disability and death. Silica exposure is also linked to lung cancer, COPD and kidney disease. The particles stay airborne long after blasting stops, so bystanders without protection are exposed too.

Is sandblasting with silica sand banned?

It depends on the country. According to NIOSH, Great Britain restricted silica sand for abrasive blasting in 1949 and the European Economic Community countries have restricted it since 1966. In the United States it is not banned outright, but OSHA limits respirable crystalline silica to 50 µg/m³ over an 8-hour day; the EU binding limit is 0.1 mg/m³.

Is bristle blasting safer than sandblasting?

Bristle blasting removes several of blasting's largest hazards: there is no loose abrasive, no silica-laden media cloud, no pressurized media stream and no containment to build. It is not dust-free, because removed rust and coating still become particles, so extraction and respiratory protection chosen from the risk assessment remain necessary, especially on coatings containing lead or chromium-6.

Can you get silicosis from blasting with other abrasives?

The risk depends on the crystalline silica content of the abrasive and of the surface being blasted. Low-silica abrasives such as steel grit, garnet or mineral slags greatly reduce silica exposure, but blasting concrete, stone or silica-containing coatings can still release silica dust, and other contaminants in old coatings can be hazardous. Exposure should be assessed for every job.