The Canadian aftermarket is slowly waking up to the realization that asbestos is still coming into Canada in the form of imported brake friction products – and the volume at which it is entering the country continues to grow.
According to recent Canadian media reports, Statistics Canada reported that imports of asbestos-related items increased to $6 million in 2015 from $4.9 million in 2013. The reports suggest that the majority of these goods are from asbestos brake linings and pads, valued at some $3.6 million in 2014.
Asbestos was once a commonly used material in a wide range of products in Canada, including floor tiles and thermal/electrical insulation; products used in the construction of homes, hospitals, schools, office towers and apartment buildings; and automotive brake friction. Asbestos in brakes provided a means for better heat distribution and noise reduction. However, asbestos has a long history of causing health issues to those who are exposed to it. Long-term exposure can potentially lead to two kinds of cancers: cancer of the lung tissue, and mesothelioma, a cancer of the membrane that surrounds the lungs and other internal organs.
Since the 1980s, there has been an ongoing effort to remove asbestos from use in construction and manufacturing of products, including in the manufacture of brake friction.
While domestic makers of brake friction in Canada and the United States have moved away from using asbestos, this has not stopped foreign makers of brake friction from doing so. This has meant that asbestos is still finding its way into brake friction products coming into North America.
“We can tell you that the Ministry of Labour has been aware of brake pads with asbestos being imported into Canada since 2012,” says Janet Deline, a spokesperson with the Ministry of Labour. “According to Statistics Canada reports, more than $2.6 million worth of brake pads containing asbestos entered Canada in 2011, with more than half imported into Ontario. While the ministry does not track the use of aftermarket brakes in this industry, we are aware that these products pose an increased risk of asbestos-related diseases for auto brake mechanics.”
What may come as a surprise to Canadian automotive technicians is the Canadian government does not currently prevent the importation of brake friction products containing asbestos.
Rick Jamieson, president and CEO of ABS Friction Inc., says he is not surprised that Canadian technicians are unaware; Canadians as a whole are not aware that products that use asbestos are still allowed to come into Canada. “The public thinks it is banned, and mechanics think it is banned, and the reality is it is not,” Jamieson says. “If it was banned in Canada, it would not be imported here.”
Jamieson says that the reason why such products come into the Canadian market is simple – price. Brake fiction using asbestos in its formulation is sold as an inexpensive aftermarket brake product.
Steve Fletcher, managing director
with the Automotive Recyclers of Canada, says it has been some 25 years since asbestos was used by OEMs in domestically produced brake friction. However, Fletcher adds, an importer of brake friction products may not be aware that asbestos is in the products, because there is nothing on the product to indicate that asbestos has been used.
For members involved in vehicle recycling, the issue of asbestos only came up recently when the government of Ontario began consultations last year looking at amending the Environmental Bill of Rights (EBR) and proposals regarding standards for end-of-life vehicle processors.
“We always had a voluntary code of how our members can depollute a vehicle,” says Fletcher. “We have taken [that code] to the government as to how vehicles can be handled, how to safely handle the removal of ozone-depleting substances, the collection of fluids and such. [The government] put asbestos on the table about a year ago, and our assumption was that [asbestos] had already been phased out.”
The amendments proposed for end-of-life vehicle waste disposal included a range of contaminates that now have to be removed prior to the crushing or shredding of a vehicle. These contaminates include such obvious things as fuels, brake and steering fluids, coolant fluids, refrigerants, batteries, and tires. Amongst the things to be removed were brake pads containing asbestos (go to www.ebr.gov.on.ca and click the links to see the list of proposed products).
“Right now, when we dismantle a vehicle, we are not going down to the brake pad level, and we are not cracking open the brake drum,” Fletcher continues. “Ten years ago, we might have done so, as some of the parts could be reused. But the economics now make doing so not worth the effort. But under the new regulations, with the requirement to remove the brakes, you are now exposing us to a hazard that we were not exposed to before.”
For technicians, the hazard comes from exposure to dust that can contain asbestos and can be released during a brake job on a vehicle. That can occur from a technician cleaning brake assemblies and clutch housings, grinding brake linings, and even sweeping floors. Health and Safety Ontario has listed a series of safe work guidelines to protect technicians from asbestos dust. nJN
While You Are Working
Brake dust contributes equally to environmental pollution as exhaust emissions. The concerns towards the effects on humans has triggered significant research which shows that during heavy braking new materials are formed, some being cacogenic and mutagenic. Also particle sizes less than 2.5nm are released to the atmosphere, these penetrating deep into the lungs. Until now no “on-vehicle” system exists that allows the dust to be collected at source. The developing technique embraces the whole of the brake. The CBPModule allows clean air to enter, scrubs the brake disc, filters the air and allows clear air back to the environment.
A brake dust collection module has been designed and manufactured. To undertake an independent and professional appraisal of the performance of the module a test procedure was completed by LINK Engineering. The platform was the front brake of a 2005 Dodge Caravan. Measurements included the interface friction coefficient, original and final temperatures of disc and both the inner & outer pad, and wear. The testing procedure complied with test procedure SAE J2707 METHOD D. This establishes a baseline test (brake without the module) and then the same testing procedure with the module fitted using eight different drive cycles. This first prototype testing showed dust collection to be 92% by weight. It was also shown that over the majority of the cycles the brake temperature was reduced. In addition it was seen that disc thickness wear was reduced by 58%, inner pad by 17% and outer pad by 29%. Initial testing of a stage 2 design indicates improved dust collection and that the module may be “tuned” to direct the air to where it is needed. The module and results of both tests are to be presented at the 2016 SAE Brake Colloquium in Phoenix.
Currently there are over 1.25 billion units on the road (0.32 billion in the USA), a minimum of 5 billion brakes or 10 billion pads. In addition the industry manufactures around 90 million units per year which represents around 1 billion brake pads. All these deposit debris to the surroundings.
• Dust was initially a “dirt” issue but the environmental and health concerns resulted in “Sustainable Conservation” bringing together interested stakeholders under the banner “Brake Pad Partnership”. This concluded that some 50% of brake dust becomes airborne, about 12% falls to the road and 38 % sticks to the car. The Partnership estimated that in 2010 some 580tons of copper found its way into the California waterways and recommended “source control” rather than water treatment.