| 摘要 |
PCT No. PCT/GB81/00046 Sec. 371 Date Oct. 1, 1981 Sec. 102(e) Date Oct. 1, 1981 PCT Filed Mar. 13, 1981 PCT Pub. No. WO81/02699 PCT Pub. Date Oct. 1, 1981.The invention provides an in-line method of impregnating a porous article, particularly a metal casting, which comprises placing the article on a support, placing a cover thereover in sealing relation with support to define an impregnation chamber, applying a reduced pressure to the cover at the upper part thereof, admitting impregnant to the chamber until it at least covers the pores, allowing the pressure to rise to substantially atmospheric, removing excess impregnant from the chamber, and removing the cover from the support. Such a method permits impregnation using a conveyor line system.
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