Imtech Preaches Impregnation For Plated Parts
Peter Gebhard has a very practical way to explain the densification process in die casting.
Peter Gebhard has a very practical way to explain the densification process in die casting, and how it relates to porosity issues that affect surface finishing.
“Castings are taking a liquid and making it a solid, and that’s a densification process,” says Gebhard, owner of Imtech, a California impregnation company.
“The only thing that expands when it goes from a liquid to a solid is ice, and everything else shrinks and causes pores to develop. I like ice in my scotch and whiskey, but I don’t like it in my engine block,” he says. “Pores develop with the shrinking, and then you have a problem.”
And Gebhard knows a thing or two about porosity and impregnation, having been one of the pioneers in solving porosity problems in cast metals, powdered metals, electronic components and ceramic parts as previous owner of Rhode Island-based Impco Inc., which was purchased by Godfrey and Wing in 2014.