The passivation technology and related parameters based on phosphomolybdie heteropolyacid were determined making use of neutral salt spraying test, damp-hot test, and saline water immersi.

Test study on passivation methods in chemical cleaning of boilers, including to use sodium nitrite, hydrogen peroxide, polyphosphate, hydrazine, acetone oxime, trisodium phosphate, and sodium carbonate, has been carried out, and combined with typical examples of application, recommendations for selecting these passivation methods and for using suitable passivation technology being put forwad.

So the deep-hole springing blasting is suggested,then,the technique of expanding、parameters of blasting and matters needing attention are introduced.

The effect of various H-desorption pressures in HD process on sintered NdFeB permanent magnets is studied.

It shows that to choose an optimal H-desorption grade in HD process is important .

A summary on the extend and alienation of the principle of blasting cradle during 20th century is put forward in this paper, the author preferably thinks that is acentury of the conbination of blasting and explosion technology.