parts some protection, as by the application of organic coatinTs, such 

 as coal tar enamels, or metallic coatin:-3, such as zinc. Cadmium has 

 also been used in place of zinc and there has been sonie controversy as to 

 the relative merits of zinc and cadmium for protecting steel in marine 

 atmospheres. 



Results of tests in progress at Kure Beach show a considerable advantage 

 of cadrnium over zinc. Specimens carrying different thicknesses of electro- 

 deposited coatings have been exposed to the sea spray atmosphere near the 

 breakers, 'flie dataasse^ibled in Table 2 indicate the greater durability 

 of the cadmium coatings and the advantage of urdng coatings of adequate 

 thickness, especially in the case of zinc* 



Some interest has been shovm also in the use of Monel for fastenings in 

 this service. Tests indicate that such Monel fastenings vj-ill have an 

 extremely long life, 



TABLE 2 



PROGRESS OF RUSTING OF ZIMG AIID C/JJiHUl;! PLATED STEEL 

 SPECIMENS EXPOSED TO dEA SPPJIY AT1.I0SPHERE AT KURE BEACH, N. C. 



11 



