HARRISBURG — Gov. Tom Corbett is expected to sign a bill to prevent coverage of most abortions under policies offered in a federally run insurance marketplace starting next year in Pennsylvania after the Senate passed it Wednesday by a comfortable margin.

A spokeswoman for the Republican governor, an opponent of abortion rights, said he will sign the bill. It passed the Senate, 31-19, and the House approved it in April, 144-53, but only after divisive debates.

Critics said the bill expands restrictions on abortion rights and discriminates against poor women.

“What we’re doing here is really a backdoor attempt to deprive women of their legal right to an abortion,” said Sen. Larry Farnese, D-Philadelphia. “I know that’s not comfortable to speak about in this place, but that’s what this is.”