There are greatly increased numbers of requests from the auto and truck industry, vehicle and parts manufacturers and government Departments of Transportation about corrosion testing with calcium chloride (CaCl2) and magnesium chloride (MgCl2) [as opposed to the more commonly, and historically, used sodium chloride (NaCl)]. There is greatly increased usage of calcium chloride and magnesium chloride being applied to roads and highways as a deicing agent. This affects infrastructure (such as signaling apparatus), bridges, etc. as well as vehicles in some differing, and unknown, ways.
It appears at least initially, that the calcium chloride produces more highly corroded results than the sodium chloride, although it is unknown of quantitatively how much that may or may not be for like tested materials. Initially it is known that some organizations conducting these type tests with calcium chloride appear to be replacing the 5% sodium chloride in the B117 type tests with an equivalent 5% calcium chloride solution. It is most probable that the use of calcium chloride and magnesium chloride and corrosion testing of this type is going to increase. The intent of establishing a work item in G.01.05.03 for these issues is to: a) investigate whether a modification or addition to ASTM B117 would suffice; or b) if a new standard may need to be developed; and the content any resulting test(s).
KeywordsSalt Spray (Fog) exposure; Controlled corrosive environment; Corrosive conditions;
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development