Sodium mercaptobenzothiazole

The solvent action of mineral oil base stocks can cause skin problems and prolonged exposure may have been the origin of a few skin cancers . The use of additives that might be in any way harmful to health, e.g. ortho-tricresyl phosphate (anti-wear) and sodium mercaptobenzothiazole (anticorrosion) has been discontinued where skin contact is likely. 

In a very few cases there are inhibitors that have been developed for the protection of specific metals, e.g. sodium mercaptobenzothiazole and benzotriazole for preventing the corrosion of copper. 

Dissimilar metals in the same system Because of the specific action of many inhibitors towards particular metals, problems arise in systems containing more than one metal. In the majority of cases these problems can be overcome by the choice of a formulation incorporating inhibitors for the protection of each of the metals involved. With this procedure it is necessary not only to maintain an adequate concentration of each of the inhibitors but also to ensure that they are present in the correct proportion. This is because of two effects firstly, failure to inhibit the corrosion of one metal may intensify the attack on the other metal the best example of this is with aluminium and copper in the same system, and failure to inhibit copper corrosion — usually achieved with sodium mercaptobenzothiazole or benzotriazole—can lead to increased corrosion of the aluminium as a result of deposition of copper from copper ions in solution on to the aluminium surface. Secondly, an inhibitor of the corrosion of one metal may actually intensify the corrosion of another metal. Thus, benzoate is usually used to prevent the corrosion of soldered joints by nitrite inhibitor added to protect cast iron in the same system. A benzoate nitrite ratio of greater than 7 1 is necessary in these cases. 

Sodium mercaptobenzothiazole (MBT) is seldom used today due to its susceptibility to breakdown by chlorine. 

Triethanolammonium phosphate and sodium mercaptobenzothiazole for steel and copper. 

Sodium MBT Sodium mercaptobenzothiazole. See Sodium 2-mercapto-benzothiazole... 

Synonyms 2-Mercaptobenzothiazole sodium deriv. 2-Mercaptobenzothia-zole sodium salt NaMBT Sodium MBT Sodium mercaptobenzothiazole... 

Sodium metaborate peroxyhydrate - 836 Sodium mercaptobenzothiazole - 626 Sodium metaarsenite - 209 Sodium metaphosphate - 58, 89, 138, 156, 170,... 

Figure 10.12 N-f-butyl-2-benzothiazole Sulfenamide (TBBS) Is produced from the reaction of f-butylamine with sodium mercaptobenzothiazole (Na-MBT)...

Mercaptobenzothiazole Sodium Hydroxide Sodium Mercaptobenzothiazole (MBT) (NaMBT, sodium MBT)... 

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